Quarterly report pursuant to Section 13 or 15(d)

Consolidated Schedule of Investments

v3.23.1
Consolidated Schedule of Investments - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]    
Cost $ 3,797,714 $ 3,773,752 [1]
Fair value $ 4,160,917 $ 4,102,177 [2]
Investment owned, percent of net assets 191.50% 194.50%
Analytical Systems Keco Holdings, LLC    
Schedule of Investments [Line Items]    
Cost $ 10,436 $ 10,485
Fair value 8,081 8,046
ASC Interests, LLC    
Schedule of Investments [Line Items]    
Cost 3,549 3,549
Fair value 2,749 2,849
ATS Workholding, LLC    
Schedule of Investments [Line Items]    
Cost 8,503 [3] 8,484 [4]
Fair value 1,343 [3] 1,639 [4]
Barfly Ventures, LLC    
Schedule of Investments [Line Items]    
Cost 2,295 [3] 2,295 [4]
Fair value 3,748 [3] 4,031 [4]
Batjer TopCo, LLC    
Schedule of Investments [Line Items]    
Cost 14,580 15,020
Fair value 16,635 15,020
Bolder Panther Group, LLC    
Schedule of Investments [Line Items]    
Cost 111,952 112,576
Fair value 129,955 130,614
Brewer Crane Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 10,120 10,244
Fair value 12,400 13,044
Bridge Capital Solutions Corporation    
Schedule of Investments [Line Items]    
Cost 12,945 12,945
Fair value 15,153 15,153
California Splendor Holdings LLC    
Schedule of Investments [Line Items]    
Cost 42,873 42,720
Fair value 57,639 57,489
Centre Technologies Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 21,082 21,076
Fair value 24,220 23,654
Chamberlin Holding LLC    
Schedule of Investments [Line Items]    
Cost 30,153 30,148
Fair value 42,575 42,575
Charps, LLC    
Schedule of Investments [Line Items]    
Cost 6,615 6,606
Fair value 19,244 19,034
Clad-Rex Steel, LLC    
Schedule of Investments [Line Items]    
Cost 18,492 18,969
Fair value 19,002 20,309
Cody Pools, Inc.    
Schedule of Investments [Line Items]    
Cost 49,458 50,281
Fair value 100,581 100,443
Colonial Electric Company LLC    
Schedule of Investments [Line Items]    
Cost 30,530 30,831
Fair value 31,050 32,311
CompareNetworks Topco, LLC    
Schedule of Investments [Line Items]    
Cost 6,837 7,207
Fair value 23,309 25,071
Datacom, LLC    
Schedule of Investments [Line Items]    
Cost 11,221 11,023
Fair value 10,881 10,682
Digital Products Holdings LLC    
Schedule of Investments [Line Items]    
Cost 24,704 25,024
Fair value 25,038 25,358
Direct Marketing Solutions, Inc.    
Schedule of Investments [Line Items]    
Cost 35,063 35,434
Fair value 48,576 49,487
Elgin AcquireCo, LLC    
Schedule of Investments [Line Items]    
Cost 34,041 34,040
Fair value 34,041 34,040
Gamber-Johnson Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 80,601 81,377
Fair value 122,648 114,968
Garreco, LLC    
Schedule of Investments [Line Items]    
Cost 4,749 5,026
Fair value 5,129 5,626
GRT Rubber Technologies LLC    
Schedule of Investments [Line Items]    
Cost 54,354 54,048
Fair value 85,898 85,603
Gulf Publishing Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 11,681 11,681
Fair value 6,064 6,064
Harris Preston Fund Investments    
Schedule of Investments [Line Items]    
Cost 4,275 [5],[6] 4,143 [7],[8]
Fair value 7,257 [5],[6] 7,800 [7],[8]
Jensen Jewelers of Idaho, LLC    
Schedule of Investments [Line Items]    
Cost 3,257 17,420
Fair value 17,300 3,255
Johnson Downie Opco, LLC    
Schedule of Investments [Line Items]    
Cost 13,062 13,056
Fair value 16,549 15,539
JorVet Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 36,186 36,173
Fair value 36,186 36,173
KBK Industries, LLC    
Schedule of Investments [Line Items]    
Cost 6,477  
Fair value 17,730  
Kickhaefer Manufacturing Company, LLC    
Schedule of Investments [Line Items]    
Cost 37,631 37,448
Fair value 34,399 34,286
Market Force Information, LLC    
Schedule of Investments [Line Items]    
Cost 49,482 48,847
Fair value 0 7,700
MetalForming AcquireCo, LLC    
Schedule of Investments [Line Items]    
Cost 31,252 31,123
Fair value 31,252 31,123
MH Corbin Holding LLC    
Schedule of Investments [Line Items]    
Cost 16,440 16,556
Fair value 5,384 4,548
MS Private Loan Fund I, LP    
Schedule of Investments [Line Items]    
Cost 14,250 [5],[6] 14,250 [7],[8]
Fair value 14,775 [5],[6] 14,833 [7],[8]
Mystic Logistics Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 8,466 8,466
Fair value 30,756 28,576
Nebraska Vet AcquireCo, LLC    
Schedule of Investments [Line Items]    
Cost 37,409 37,393
Fair value 41,814 38,294
NexRev LLC    
Schedule of Investments [Line Items]    
Cost 18,940 19,548
Fair value 11,860 9,587
NRP Jones, LLC    
Schedule of Investments [Line Items]    
Cost 5,797 5,797
Fair value 7,160 6,870
NuStep, LLC    
Schedule of Investments [Line Items]    
Cost 35,078 35,075
Fair value 35,596 36,003
OMi Topco, LLC    
Schedule of Investments [Line Items]    
Cost 15,977 16,714
Fair value 40,100 38,560
Orttech Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 32,646 33,429
Fair value 36,146 35,179
Pearl Meyer Topco LLC    
Schedule of Investments [Line Items]    
Cost 55,514 41,537
Fair value 86,221 71,941
PPL RVs, Inc.    
Schedule of Investments [Line Items]    
Cost 23,800 23,787
Fair value 40,775 40,843
Principle Environmental, LLC    
Schedule of Investments [Line Items]    
Cost 12,721 12,715
Fair value 16,792 18,816
Robbins Bros. Jewelry, Inc.    
Schedule of Investments [Line Items]    
Cost 46,235 46,439
Fair value 45,095 50,249
Tedder Industries, LLC    
Schedule of Investments [Line Items]    
Cost 26,502 26,277
Fair value 24,167 24,641
Televerde, LLC    
Schedule of Investments [Line Items]    
Cost 2,008 2,008
Fair value 8,393 7,202
Trantech Radiator Topco, LLC    
Schedule of Investments [Line Items]    
Cost 12,546 12,544
Fair value 17,226 15,720
Volusion, LLC    
Schedule of Investments [Line Items]    
Cost 30,122 33,719
Fair value 13,546 14,914
VVS Holdco LLC    
Schedule of Investments [Line Items]    
Cost 42,001 41,977
Fair value 42,201 42,080
Ziegler’s NYPD, LLC    
Schedule of Investments [Line Items]    
Cost 7,634 7,634
Fair value 3,926 4,311
AAC Holdings, Inc.    
Schedule of Investments [Line Items]    
Cost 15,625 [9] 14,738 [10]
Fair value 12,164 [9] 11,550 [10]
ATX Networks Corp.    
Schedule of Investments [Line Items]    
Cost [10]   8,499
Fair value [10]   12,211
BBB Tank Services, LLC    
Schedule of Investments [Line Items]    
Cost 5,762 5,762
Fair value 2,886 2,886
Boccella Precast Products LLC    
Schedule of Investments [Line Items]    
Cost 2,576 2,576
Fair value 3,090 3,290
Buca C, LLC    
Schedule of Investments [Line Items]    
Cost 21,750 22,125
Fair value 11,962 12,337
Career Team Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 24,591 24,581
Fair value 24,591 24,581
Classic H&G Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 29,512 29,502
Fair value 49,534 48,471
DMA Industries, LLC    
Schedule of Investments [Line Items]    
Cost 26,990 26,979
Fair value 28,460 28,460
Dos Rios Partners    
Schedule of Investments [Line Items]    
Cost 8,510 [5],[6] 8,510 [7],[8]
Fair value 12,181 [5],[6] 12,025 [7],[8]
Flame King Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 38,992 38,975
Fair value 49,990 46,380
Freeport Financial Funds    
Schedule of Investments [Line Items]    
Cost 9,274 [5],[6] 9,810 [7],[8]
Fair value 8,795 [5],[6] 9,331 [7],[8]
GFG Group, LLC.    
Schedule of Investments [Line Items]    
Cost 16,175 16,169
Fair value 18,935 18,485
Harris Preston Fund Investments    
Schedule of Investments [Line Items]    
Cost 5,782 [5],[6] 6,290 [7],[8]
Fair value 7,668 [5],[6] 8,063 [7],[8]
Hawk Ridge Systems, LLC    
Schedule of Investments [Line Items]    
Cost 44,692 43,868
Fair value 60,180 59,365
Houston Plating and Coatings, LLC    
Schedule of Investments [Line Items]    
Cost 5,352 5,352
Fair value 5,830 5,400
Infinity X1 Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 21,823  
Fair value 21,823  
Iron-Main Investments, LLC    
Schedule of Investments [Line Items]    
Cost 49,738 37,931
Fair value 49,738 37,931
OnAsset Intelligence, Inc.    
Schedule of Investments [Line Items]    
Cost 12,683 12,683
Fair value 5,255 5,309
Oneliance, LLC    
Schedule of Investments [Line Items]    
Cost 6,538 6,615
Fair value 6,538 6,615
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)    
Schedule of Investments [Line Items]    
Cost 32,365
Fair value 0
SI East, LLC    
Schedule of Investments [Line Items]    
Cost 85,708 90,926
Fair value 98,186 103,436
Slick Innovations, LLC    
Schedule of Investments [Line Items]    
Cost 13,924 14,154
Fair value 15,390 15,370
Sonic Systems International, LLC    
Schedule of Investments [Line Items]    
Cost 16,898 [3] 16,883 [4]
Fair value 16,999 [3] 17,049 [4]
Student Resource Center, LLC    
Schedule of Investments [Line Items]    
Cost 4,556 [3] 4,556 [4]
Fair value 4,556 [3] 4,556 [4]
Superior Rigging & Erecting Co.    
Schedule of Investments [Line Items]    
Cost 24,895 25,878
Fair value 25,365 25,878
The Affiliati Network, LLC    
Schedule of Investments [Line Items]    
Cost 15,636 15,948
Fair value 15,636 15,948
UniTek Global Services, Inc.    
Schedule of Investments [Line Items]    
Cost 20,742 [9] 20,535 [10]
Fair value 12,382 [9] 11,510 [10]
Universal Wellhead Services Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 5,032 [3] 5,032 [4]
Fair value 218 [3] 220 [4]
World Micro Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 17,992 17,985
Fair value 17,992 17,985
AB Centers Acquisition Corporation    
Schedule of Investments [Line Items]    
Cost 19,796 [3] 17,216 [4]
Fair value 20,371 [3] 17,754 [4]
Acousti Engineering Company of Florida    
Schedule of Investments [Line Items]    
Cost 12,156 [3] 12,294 [4]
Fair value 12,230 [3] 12,376 [4]
Acumera, Inc.    
Schedule of Investments [Line Items]    
Cost 19,293 [3] 18,561 [4]
Fair value 19,714 [3] 18,986 [4]
Adams Publishing Group, LLC    
Schedule of Investments [Line Items]    
Cost 30,462 [3] 28,762 [4]
Fair value 30,200 [3] 28,815 [4]
AMEREQUIP LLC.    
Schedule of Investments [Line Items]    
Cost 38,436 [3] 38,461 [4]
Fair value 39,158 [3] 39,105 [4]
American Health Staffing Group, Inc.    
Schedule of Investments [Line Items]    
Cost 6,542 [3] 6,555 [4]
Fair value 6,590 [3] 6,607 [4]
American Nuts, LLC    
Schedule of Investments [Line Items]    
Cost 29,296 [3] 30,816 [4]
Fair value 25,405 [3] 29,260 [4]
American Teleconferencing Services, Ltd.    
Schedule of Investments [Line Items]    
Cost 16,686 [9] 16,686 [10]
Fair value 889 [9] 976 [10]
ArborWorks, LLC    
Schedule of Investments [Line Items]    
Cost 33,877 [3] 34,064 [4]
Fair value 27,523 [3] 29,010 [4]
Archer Systems, LLC    
Schedule of Investments [Line Items]    
Cost 65,246 [3] 67,583 [4]
Fair value 65,104 [3] 67,764 [4]
ATS Operating, LLC    
Schedule of Investments [Line Items]    
Cost 14,400 [3] 14,040 [4]
Fair value 14,195 [3] 13,835 [4]
AVEX Aviation Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 30,946 [3] 28,230 [4]
Fair value 30,939 [3] 28,276 [4]
Berry Aviation, Inc.    
Schedule of Investments [Line Items]    
Cost 1,381 [3] 1,356 [4]
Fair value 6,081 [3] 5,026 [4]
Bettercloud, Inc.    
Schedule of Investments [Line Items]    
Cost 27,384 [3] 26,944 [4]
Fair value 27,847 [3] 27,429 [4]
Bluestem Brands, Inc.    
Schedule of Investments [Line Items]    
Cost 4,688 [9] 3,317 [10]
Fair value 8,010 [9] 9,094 [10]
Brainworks Software, LLC    
Schedule of Investments [Line Items]    
Cost 7,817 [11],[12],[13] 7,817 [4]
Fair value 2,895 [11],[12],[13] 3,677 [4]
Brightwood Capital Fund Investments    
Schedule of Investments [Line Items]    
Cost 13,412 [5],[6] 13,412 [7],[8]
Fair value 11,530 [5],[6] 11,497 [7],[8]
Burning Glass Intermediate Holding Company, Inc.    
Schedule of Investments [Line Items]    
Cost 20,317 [3] 19,628 [4]
Fair value 20,606 [3] 19,933 [4]
Cadence Aerospace LLC    
Schedule of Investments [Line Items]    
Cost [3] 28,846  
Fair value [3] 28,891  
CAI Software LLC    
Schedule of Investments [Line Items]    
Cost 1,789 1,789
Fair value 1,789 1,789
Camin Cargo Control, Inc.    
Schedule of Investments [Line Items]    
Cost [9] 15,079  
Fair value [9] 14,646  
CaseWorthy, Inc.    
Schedule of Investments [Line Items]    
Cost 14,238 [3] 14,228 [4]
Fair value 14,288 [3] 14,282 [4]
Channel Partners Intermediateco, LLC    
Schedule of Investments [Line Items]    
Cost 44,884 [3] 40,163 [4]
Fair value 44,768 [3] 40,325 [4]
Computer Data Source, LLC    
Schedule of Investments [Line Items]    
Cost 23,267 [3] 23,243 [4]
Fair value 21,507 [3] 21,799 [4]
Dalton US Inc.    
Schedule of Investments [Line Items]    
Cost 17,202 [3] 15,123 [4]
Fair value 17,204 [3] 15,390 [4]
DTE Enterprises, LLC    
Schedule of Investments [Line Items]    
Cost 7,598 [3] 8,001 [4]
Fair value 7,204 [3] 7,474 [4]
Dynamic Communities, LLC    
Schedule of Investments [Line Items]    
Cost 3,487 [3] 3,487 [4]
Fair value 3,487 [3] 3,487 [4]
Eastern Wholesale Fence LLC    
Schedule of Investments [Line Items]    
Cost 31,410 [3] 31,406 [4]
Fair value 30,778 [3] 31,159 [4]
EnCap Energy Fund Investments    
Schedule of Investments [Line Items]    
Cost 28,498 [5],[6] 28,866 [7],[8]
Fair value 22,301 [5],[6] 21,905 [7],[8]
Cody Pools, Inc.    
Schedule of Investments [Line Items]    
Cost 16,920 [3] 16,132 [4]
Fair value 17,114 [3] 16,469 [4]
Event Holdco, LLC    
Schedule of Investments [Line Items]    
Cost 47,642 [3],[14] 47,618 [4]
Fair value 45,549 [3],[14] 45,590 [4]
Flip Electronics LLC    
Schedule of Investments [Line Items]    
Cost 11,854 [3] 11,588 [4]
Fair value 12,077 [3] 11,831 [4]
Fuse, LLC    
Schedule of Investments [Line Items]    
Cost 2,066 [9] 2,066 [10]
Fair value 1,512 [9] 1,512 [10]
GS HVAM Intermediate, LLC    
Schedule of Investments [Line Items]    
Cost 11,802 [3] 12,864 [4]
Fair value 11,815 [3] 12,876 [4]
GULF PACIFIC ACQUISITION, LLC    
Schedule of Investments [Line Items]    
Cost 4,197 [3] 3,809 [4]
Fair value 4,281 [3] 3,898 [4]
HDC/HW Intermediate Holdings    
Schedule of Investments [Line Items]    
Cost 3,715 [3] 3,581 [4]
Fair value 3,632 [3] 3,497 [4]
HEADLANDS OP-CO LLC    
Schedule of Investments [Line Items]    
Cost 16,340 [3] 16,359 [4]
Fair value 16,630 [3] 16,667 [4]
IG Parent Corporation    
Schedule of Investments [Line Items]    
Cost 14,263 [9],[11],[14] 14,974 [10]
Fair value 14,320 [9],[11],[14] 15,197 [10]
Independent Pet Partners Intermediate Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 34,533 [3] 30,253 [4]
Fair value 18,004 [3] 15,429 [4]
Industrial Services Acquisition, LLC    
Schedule of Investments [Line Items]    
Cost 21,026 [3] 20,507 [4]
Fair value 21,036 [3] 20,540 [4]
Infolinks Media Buyco, LLC    
Schedule of Investments [Line Items]    
Cost 8,452 [3] 8,442 [4]
Fair value 8,576 [3] 8,574 [4]
Interface Security Systems, L.L.C    
Schedule of Investments [Line Items]    
Cost 9,072 [3] 8,919 [4]
Fair value 2,863 [3] 2,764 [4]
Invincible Boat Company, LLC.    
Schedule of Investments [Line Items]    
Cost 17,516 [3] 17,402 [4]
Fair value 17,615 [3] 17,511 [4]
Jackmont Hospitality, Inc.    
Schedule of Investments [Line Items]    
Cost 2,610 [3] 2,685 [4]
Fair value 3,014 [3] 3,202 [4]
Joerns Healthcare, LLC    
Schedule of Investments [Line Items]    
Cost 10,857 [9] 10,723 [10]
Fair value 2,711 [9] 2,801 [10]
JTI Electrical & Mechanical, LLC    
Schedule of Investments [Line Items]    
Cost 37,717 [3] 37,907 [4]
Fair value 39,425 [3] 39,652 [4]
KMS, LLC    
Schedule of Investments [Line Items]    
Cost 8,390 [3] 8,410 [4]
Fair value 7,999 [3] 8,017 [4]
LL Management, Inc.    
Schedule of Investments [Line Items]    
Cost 27,974 [3] 27,980 [4]
Fair value 27,739 [3] 27,926 [4]
Mako Steel, LP    
Schedule of Investments [Line Items]    
Cost 16,849 [3] 18,185 [4]
Fair value 16,910 [3] 18,307 [4]
MB2 Dental Solutions, LLC    
Schedule of Investments [Line Items]    
Cost 16,954 [9] 16,051 [10]
Fair value 17,115 [9] 16,214 [10]
Microbe Formulas, LLC    
Schedule of Investments [Line Items]    
Cost 25,234 [3] 25,556 [4]
Fair value 24,796 [3] 25,118 [4]
MonitorUS Holding, LLC    
Schedule of Investments [Line Items]    
Cost 29,454 [3],[6],[15] 27,494 [4],[8],[16]
Fair value 30,688 [3],[6],[15] 28,577 [4],[8],[16]
NinjaTrader, LLC    
Schedule of Investments [Line Items]    
Cost 21,415 [3] 21,379
Fair value 21,633 [3] 21,628
NWN Corporation    
Schedule of Investments [Line Items]    
Cost 50,319 [3] 49,085 [4]
Fair value 48,371 [3] 47,530 [4]
Paragon Healthcare, Inc.    
Schedule of Investments [Line Items]    
Cost 22,460 [3] 20,898 [4]
Fair value 22,494 [3] 21,118 [4]
Project Eagle Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 28,943 [3] 29,022 [4]
Fair value 28,981 [3] 29,401 [4]
PTL US Bidco, Inc    
Schedule of Investments [Line Items]    
Cost 28,886 [6] 27,575 [4],[8]
Fair value 28,736 [6] 27,737 [4],[8]
RA Outdoors LLC    
Schedule of Investments [Line Items]    
Cost 13,624 [3] 13,230
Fair value 12,398 [3] 12,083
RM Bidder, LLC    
Schedule of Investments [Line Items]    
Cost 471 [3] 471 [4]
Fair value 20 [3] 19 [4]
Roof Opco, LLC    
Schedule of Investments [Line Items]    
Cost 5,412 [3] 5,716 [4]
Fair value 5,428 [3] 5,817 [4]
RTIC Subsidiary Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 17,304 [3] 17,849 [4]
Fair value 15,951 [3] 16,625 [4]
Rug Doctor, LLC.    
Schedule of Investments [Line Items]    
Cost 13,833 [3] 13,813 [4]
Fair value 12,850 [3] 12,515 [4]
SIB Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 9,916 [3] 9,761 [4]
Fair value 9,014 [3] 9,123 [4]
South Coast Terminals Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 41,338 [3] 41,396 [4]
Fair value 42,401 [3] 42,500 [4]
SPAU Holdings, LLC    
Schedule of Investments [Line Items]    
Cost 16,202 [3] 16,223 [4]
Fair value 16,473 [3] 16,510 [4]
Veregy Consolidated, Inc.    
Schedule of Investments [Line Items]    
Cost 16,778 [9] 16,751 [10]
Fair value 14,622 [9] 14,849 [10]
Wahoo Fitness Acquisition L.L.C.    
Schedule of Investments [Line Items]    
Cost [9] 16,240  
Fair value [9] 8,172  
Wall Street Prep, Inc.    
Schedule of Investments [Line Items]    
Cost 4,546 [3] 4,567 [4]
Fair value 4,539 [3] 4,560 [4]
Watterson Brands, LLC    
Schedule of Investments [Line Items]    
Cost 30,815 [3] 29,286 [4]
Fair value 31,106 [3] 29,708 [4]
West Star Aviation Acquisition, LLC    
Schedule of Investments [Line Items]    
Cost 12,113 [3] 12,129 [4]
Fair value 12,913 [3] 12,615 [4]
Winter Services LLC    
Schedule of Investments [Line Items]    
Cost 9,806 [3] 9,797 [4]
Fair value 9,983 [3] 9,975 [4]
Xenon Arc, Inc.    
Schedule of Investments [Line Items]    
Cost 62,415 [3] 61,337 [4]
Fair value 63,039 [3] 61,968 [4]
Zips Car Wash, LLC    
Schedule of Investments [Line Items]    
Cost 21,644 [3] 21,639 [4]
Fair value 21,840 [3] 21,891 [4]
Control investments    
Schedule of Investments [Line Items]    
Cost 1,315,277 [17],[18] 1,270,802 [1],[19]
Fair value $ 1,746,003 [17],[20] $ 1,703,172 [2],[19]
Investment owned, percent of net assets 80.40% 80.80%
Affiliate investments    
Schedule of Investments [Line Items]    
Cost $ 591,458 [18],[21] $ 635,536 [1],[22]
Fair value $ 626,227 [20],[21] $ 618,359 [2],[22]
Investment owned, percent of net assets 28.80% 29.30%
Non‑Control/Non‑Affiliate investments    
Schedule of Investments [Line Items]    
Cost $ 1,890,979 $ 1,867,414 [1],[23]
Fair value $ 1,788,687 $ 1,780,646 [2],[23]
Investment owned, percent of net assets 82.30% 84.40%
Investment, Identifier [Axis]: AAC Holdings, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 593,928 [9] 593,928 [10]
Cost $ 3,148 [9] $ 3,148 [10]
Fair value $ 0 [9] $ 0 [10]
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [10]   18.00%
PIK Rate [10]   18.00%
Principal [10]   $ 11,726
Cost [10]   11,590
Fair value [10]   $ 11,550
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [9] 18.00%  
Principal [9] $ 320  
Cost [9] 315  
Fair value [9] $ 309  
Investment, Identifier [Axis]: AAC Holdings, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [9] 18.00%  
PIK Rate [9] 18.00%  
Principal [9] $ 12,285  
Cost [9] 12,162  
Fair value [9] $ 11,855  
Investment, Identifier [Axis]: AAC Holdings, Inc., Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 554,353 [9],[24] 554,353 [10],[25]
Cost $ 0 [9],[24] $ 0 [10],[25]
Fair value $ 0 [9],[24] $ 0 [10],[25]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 13.00%  
Reference Rate and Spread 5.00% [3],[11] 6.00% [4],[26],[27],[28]
Principal $ 371 [3],[11] $ 0 [4],[26],[27],[28]
Cost 333 [3],[11] (39) [4],[26],[27],[28]
Fair value $ 370 [3],[11] $ (39) [4],[26],[27],[28]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.80% [3],[11],[14],[29] 10.20% [4],[26],[27]
Reference Rate and Spread 6.00% [3],[11],[14],[29] 6.00% [4],[26],[27]
Principal $ 2,224 [3],[11],[14],[29] $ 741 [4],[26],[27]
Cost 2,129 [3],[11],[14],[29] 653 [4],[26],[27]
Fair value $ 2,217 [3],[11],[14],[29] $ 741 [4],[26],[27]
Investment, Identifier [Axis]: AB Centers Acquisition Corporation, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 10.79% [3],[11],[14] 10.58% [4],[26],[27]
Reference Rate and Spread 6.00% [3],[11],[14] 6.00% [4],[26],[27]
Principal $ 17,786 [3],[11],[14] $ 17,052 [4],[26],[27]
Cost 17,334 [3],[11],[14] 16,602 [4],[26],[27]
Fair value $ 17,784 [3],[11],[14] $ 17,052 [4],[26],[27]
Investment, Identifier [Axis]: ADS Tactical, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.59% [9],[11] 10.14% [10],[27]
Reference Rate and Spread 5.75% [9],[11] 5.75% [10],[27]
Principal $ 20,712 [9],[11] $ 21,077 [10],[27]
Cost 20,443 [9],[11] 20,781 [10],[27]
Fair value $ 19,262 [9],[11] $ 18,969 [10],[27]
Investment, Identifier [Axis]: AFG Capital Group, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 186 [30] 186 [31]
Cost $ 1,200 [30] $ 1,200 [31]
Fair value $ 9,400 [30] $ 9,400 [31]
Investment, Identifier [Axis]: AMEREQUIP LLC., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 235 [3],[30] 235 [4]
Cost $ 1,844 [3],[30] $ 1,779 [4]
Fair value $ 1,930 [3],[30] $ 1,779 [4]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 7.40% [3],[11],[14],[32] 7.40% [4],[26],[27],[28]
Principal $ 0 [3],[11],[14],[32] $ 0 [4],[26],[27],[28]
Cost (130) [3],[11],[14],[32] (137) [4],[26],[27],[28]
Fair value $ (130) [3],[11],[14],[32] $ (137) [4],[26],[27],[28]
Investment, Identifier [Axis]: AMEREQUIP LLC., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.10% [3],[11],[14] 11.72% [4],[26],[27]
Reference Rate and Spread 7.40% [3],[11],[14] 7.40% [4],[26],[27]
Principal $ 37,358 [3],[11],[14] $ 37,491 [4],[26],[27]
Cost 36,722 [3],[11],[14] 36,819 [4],[26],[27]
Fair value $ 37,358 [3],[11],[14] $ 37,463 [4],[26],[27]
Investment, Identifier [Axis]: ASC Interests, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,500 1,500
Cost $ 1,500 $ 1,500
Fair value $ 700 $ 800
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 400 $ 400
Cost 400 400
Fair value $ 400 $ 400
Investment, Identifier [Axis]: ASC Interests, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 1,650 $ 1,650
Cost 1,649 1,649
Fair value $ 1,649 $ 1,649
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Preferred Member Units 1    
Schedule of Investments [Line Items]    
Total Rate 14.13%  
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 10.00%  
Investment, Identifier [Axis]: ASK (Analytical Systems Keco Holdings, LLC), Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 14.75%  
Reference Rate and Spread 10.00%  
Investment, Identifier [Axis]: ATS Operating, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 720,000 [3] 720,000 [4]
Cost $ 720 [3] $ 720 [4]
Fair value $ 660 [3] $ 660 [4]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 11.39%  
Reference Rate and Spread 6.50% [3],[11],[14] 5.50% [4],[26],[27],[28]
Principal $ 360 [3],[11],[14] $ 0 [4],[26],[27],[28]
Cost 360 [3],[11],[14] 0 [4],[26],[27],[28]
Fair value $ 360 [3],[11],[14] $ 0 [4],[26],[27],[28]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.09% [3],[11],[14] 9.32% [4],[26],[27]
Reference Rate and Spread 5.50% [3],[11],[14] 5.50% [4],[26],[27]
Principal $ 6,660 [3],[11],[14] $ 6,660 [4],[26],[27]
Cost 6,660 [3],[11],[14] 6,660 [4],[26],[27]
Fair value $ 6,582 [3],[11],[14] $ 6,582 [4],[26],[27]
Investment, Identifier [Axis]: ATS Operating, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.09% [3],[11],[14] 11.32% [4],[26],[27]
Reference Rate and Spread 7.50% [3],[11],[14] 7.50% [4],[26],[27]
Principal $ 6,660 [3],[11],[14] $ 6,660 [4],[26],[27]
Cost 6,660 [3],[11],[14] 6,660 [4],[26],[27]
Fair value $ 6,593 [3],[11],[14] $ 6,593 [4],[26],[27]
Investment, Identifier [Axis]: ATS Workholding, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 3,725,862 [3] 3,725,862 [4]
Cost $ 3,726 [3] $ 3,726 [4]
Fair value $ 0 [3] $ 0 [4]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 5.00% [3],[13] 5.00% [4],[33]
Principal $ 1,922 [3],[13] $ 1,901 [4],[33]
Cost 1,922 [3],[13] 1,901 [4],[33]
Fair value $ 523 [3],[13] $ 634 [4],[33]
Investment, Identifier [Axis]: ATS Workholding, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 5.00% [3],[13] 5.00% [4],[33]
Principal $ 3,015 [3],[13] $ 3,015 [4],[33]
Cost 2,855 [3],[13] 2,857 [4],[33]
Fair value $ 820 [3],[13] $ 1,005 [4],[33]
Investment, Identifier [Axis]: ATX Networks Corp., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) [10]   583
Cost [10]   $ 0
Fair value [10]   $ 3,270
Investment, Identifier [Axis]: ATX Networks Corp., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [10],[27]   12.23%
Reference Rate and Spread 7.50% 7.50% [10],[27]
Principal [10],[27]   $ 6,783
Cost [10],[27]   6,208
Fair value [10],[27]   $ 6,343
Investment, Identifier [Axis]: ATX Networks Corp., Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate [10]   10.00%
PIK Rate 10.00% 10.00% [10]
Principal [10]   $ 3,396
Cost [10]   2,291
Fair value [10]   $ 2,598
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 984 [3] 360 [4]
Cost $ 965 [3] $ 360 [4]
Fair value $ 1,011 [3] $ 406 [4]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [3],[11],[14] 12.52%  
Reference Rate and Spread 7.75% [3],[11],[14] 7.25% [4],[26],[27],[28]
Principal $ 2,210 [3],[11],[14] $ 0 [4],[26],[27],[28]
Cost 2,068 [3],[11],[14] (57) [4],[26],[27],[28]
Fair value $ 2,120 [3],[11],[14] $ (57) [4],[26],[27],[28]
Investment, Identifier [Axis]: AVEX Aviation Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.61% [3],[11],[14] 12.17% [4],[26],[27]
Reference Rate and Spread 7.75% [3],[11],[14] 7.25% [4],[26],[27]
Principal $ 28,999 [3],[11],[14] $ 29,071 [4],[26],[27]
Cost 27,913 [3],[11],[14] 27,927 [4],[26],[27]
Fair value $ 27,808 [3],[11],[14] $ 27,927 [4],[26],[27]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 15.50% [3],[11] 13.23% [4],[27]
Reference Rate and Spread 7.50% [3],[11] 8.50% [4],[27]
Principal $ 1,678 [3],[11] $ 1,678 [4],[27]
Cost 1,670 [3],[11] 1,669 [4],[27]
Fair value $ 1,678 [3],[11] $ 1,678 [4],[27]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 15.50% [3],[11] 13.23% [4],[27]
Reference Rate and Spread 7.50% [3],[11] 8.50% [4],[27]
Principal $ 9,756 [3],[11] $ 9,891 [4],[27]
Cost 9,696 [3],[11] 9,825 [4],[27]
Fair value $ 9,756 [3],[11] $ 9,891 [4],[27]
Investment, Identifier [Axis]: Acousti Engineering Company of Florida, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 19.50% [3],[11] 16.17% [4],[27]
Reference Rate and Spread 11.50% [3],[11] 12.50% [4],[27]
Principal $ 796 [3],[11] $ 807 [4],[27]
Cost 790 [3],[11] 800 [4],[27]
Fair value $ 796 [3],[11] $ 807 [4],[27]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 14.13% [3],[11] 13.88% [4],[27]
Reference Rate and Spread 9.50% [3],[11] 9.50% [4],[27]
Principal $ 14,618 [3],[11] $ 14,618 [4],[27]
Cost 14,308 [3],[11] 14,291 [4],[27]
Fair value $ 14,618 [3],[11] $ 14,618 [4],[27]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 14.13% [3],[11] 13.57% [4],[27]
Reference Rate and Spread 9.50% [3],[11] 9.00% [4],[27]
Principal $ 728 [3],[11] $ 4,368 [4],[27]
Cost 710 [3],[11] 4,270 [4],[27]
Fair value $ 728 [3],[11] $ 4,368 [4],[27]
Investment, Identifier [Axis]: Acumera, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 14.13%  
Reference Rate and Spread [3],[11] 9.50%  
Principal [3],[11] $ 4,368  
Cost [3],[11] 4,275  
Fair value [3],[11] $ 4,368  
Investment, Identifier [Axis]: Acumera, Inc., Warrants    
Schedule of Investments [Line Items]    
Units (in shares) [3],[34] 21,226  
Cost [3],[34] $ 0  
Fair value [3],[34] $ 0  
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.00% [3],[11],[35] 10.00% [4],[27],[36]
Reference Rate and Spread 6.50% [3],[11],[35] 6.00% [4],[27],[36]
Principal $ 7,488 [3],[11],[35] $ 4,729 [4],[27],[36]
Cost 7,488 [3],[11],[35] 4,729 [4],[27],[36]
Fair value $ 7,176 [3],[11],[35] $ 4,729 [4],[27],[36]
Investment, Identifier [Axis]: Adams Publishing Group, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.00% [3],[11],[37] 10.00% [4],[27],[36]
Reference Rate and Spread 7.50% [3],[11],[37] 7.50% [4],[27],[36]
Principal $ 23,024 [3],[11],[37] $ 24,086 [4],[27],[36]
Cost 22,974 [3],[11],[37] 24,033 [4],[27],[36]
Fair value $ 23,024 [3],[11],[37] $ 24,086 [4],[27],[36]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 6.00% [3],[11],[32] 6.00% [4],[27],[28]
Principal $ 0 [3],[11],[32] $ 0 [4],[27],[28]
Cost (10) [3],[11],[32] (10) [4],[27],[28]
Fair value $ (10) [3],[11],[32] $ (10) [4],[27],[28]
Investment, Identifier [Axis]: American Health Staffing Group, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.12% [3],[11] 11.12% [4],[27]
Reference Rate and Spread 6.00% [3],[11] 6.00% [4],[27]
Principal $ 6,600 [3],[11] $ 6,617 [4],[27]
Cost 6,552 [3],[11] 6,565 [4],[27]
Fair value $ 6,600 [3],[11] $ 6,617 [4],[27]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.49% [3],[11],[14] 10.46% [4],[26],[27]
Reference Rate and Spread 6.75% [3],[11],[14] 6.75% [4],[26],[27]
PIK Rate [3],[11],[14] 1.00%  
Principal $ 14,839 [3],[11],[14] $ 15,628 [4],[26],[27]
Cost 14,648 [3],[11],[14] 15,408 [4],[26],[27]
Fair value $ 12,721 [3],[11],[14] $ 14,606 [4],[26],[27]
Investment, Identifier [Axis]: American Nuts, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 14.49% [3],[11],[14] 12.46% [4],[26],[27]
Reference Rate and Spread 8.75% [3],[11],[14] 8.75% [4],[26],[27]
PIK Rate [3],[11],[14] 1.00%  
Principal $ 14,839 [3],[11],[14] $ 15,628 [4],[26],[27]
Cost 14,648 [3],[11],[14] 15,408 [4],[26],[27]
Fair value $ 12,684 [3],[11],[14] $ 14,654 [4],[26],[27]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 7.50% [9],[13] 7.50% [10],[33]
Reference Rate and Spread 6.50% [9],[13] 6.50% [10],[33]
Principal $ 2,980 [9],[13] $ 2,980 [10],[33]
Cost 2,980 [9],[13] 2,980 [10],[33]
Fair value $ 153 [9],[13] $ 168 [10],[33]
Investment, Identifier [Axis]: American Teleconferencing Services, Ltd., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 7.50% [9],[11],[13] 7.50% [10],[27],[33]
Reference Rate and Spread 6.50% [9],[11],[13] 6.50% [10],[27],[33]
Principal $ 14,370 [9],[11],[13] $ 14,370 [10],[27],[33]
Cost 13,706 [9],[11],[13] 13,706 [10],[27],[33]
Fair value $ 736 [9],[11],[13] $ 808 [10],[27],[33]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 3,200 3,200
Total Rate 14.13% 14.13%
Cost $ 3,200 $ 3,200
Fair value $ 0 $ 0
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 2,427 2,427
Cost $ 2,427 $ 2,427
Fair value $ 3,588 $ 3,504
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 10.00% [11],[32] 10.00% [27],[28]
Principal $ 0 [11],[32] $ 0 [27],[28]
Cost (2) [11],[32] (3) [27],[28]
Fair value $ (2) [11],[32] $ (3) [27],[28]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 14.75% [11] 14.13% [27]
Reference Rate and Spread 10.00% [11] 10.00% [27]
Principal $ 4,595 [11] $ 4,665 [27]
Cost 4,495 [11] 4,545 [27]
Fair value $ 4,495 [11] $ 4,545 [27]
Investment, Identifier [Axis]: Analytical Systems Keco Holdings, LLC, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 420 [24] 420 [25]
Cost $ 316 [24] $ 316 [25]
Fair value $ 0 [24] $ 0 [25]
Investment, Identifier [Axis]: ArborWorks, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 234 [3] 234 [4]
Cost $ 234 [3] $ 234 [4]
Fair value $ 0 [3] $ 0 [4]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 14.83% [3],[11],[14] 13.41% [4],[27]
Reference Rate and Spread 7.00% [3],[11],[14] 9.00% [4],[27]
Principal $ 4,678 [3],[11],[14] $ 4,678 [4],[27]
Cost 4,576 [3],[11],[14] 4,569 [4],[27]
Fair value $ 3,768 [3],[11],[14] $ 3,945 [4],[27]
Investment, Identifier [Axis]: ArborWorks, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 14.83% [3],[11],[14] 13.56% [4],[27]
Reference Rate and Spread 7.00% [3],[11],[14] 9.00% [4],[27]
Principal $ 29,494 [3],[11],[14] $ 29,722 [4],[27]
Cost 29,067 [3],[11],[14] 29,261 [4],[27]
Fair value $ 23,755 [3],[11],[14] $ 25,065 [4],[27]
Investment, Identifier [Axis]: Archer Systems, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 1,387,832 [3] 1,387,832 [4]
Cost $ 1,388 [3] $ 1,388 [4]
Fair value $ 1,680 [3] $ 1,388 [4]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 6.00% [3],[11],[14],[32] 6.50% [4],[26],[27],[28]
Principal $ 0 [3],[11],[14],[32] $ 0 [4],[26],[27],[28]
Cost (127) [3],[11],[14],[32] (135) [4],[26],[27],[28]
Fair value $ (127) [3],[11],[14],[32] $ (135) [4],[26],[27],[28]
Investment, Identifier [Axis]: Archer Systems, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.72% [3],[11],[14] 10.92% [4],[26],[27]
Reference Rate and Spread 6.00% [3],[11],[14] 6.50% [4],[26],[27]
Principal $ 65,171 [3],[11],[14] $ 67,597 [4],[26],[27]
Cost 63,985 [3],[11],[14] 66,330 [4],[26],[27]
Fair value $ 63,551 [3],[11],[14] $ 66,511 [4],[26],[27]
Investment, Identifier [Axis]: Arrow International, Inc, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.15% [3],[11],[38] 10.36% [4],[26],[27],[39]
Reference Rate and Spread 5.40% [3],[11],[38] 6.60% [4],[26],[27],[39]
Principal $ 36,000 [3],[11],[38] $ 36,000 [4],[26],[27],[39]
Cost 35,759 [3],[11],[38] 35,737 [4],[26],[27],[39]
Fair value $ 36,000 [3],[11],[38] $ 36,000 [4],[26],[27],[39]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 800,000 800,000
Cost $ 800 $ 800
Fair value $ 0 $ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Preferred Stock (non-voting)    
Schedule of Investments [Line Items]    
Total Rate 15.00% 15.00%
Cost $ 162 $ 162
Fair value $ 0 $ 0
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 15.66% [11],[12] 15.12% [27],[40]
Reference Rate and Spread 11.00% [11],[12] 11.00% [27],[40]
Principal $ 800 [11],[12] $ 800 [27],[40]
Cost 800 [11],[12] 800 [27],[40]
Fair value $ 800 [11],[12] $ 800 [27],[40]
Investment, Identifier [Axis]: BBB Tank Services, LLC, Unsecured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 15.66% [11],[12] 15.12% [27],[40]
Reference Rate and Spread 11.00% [11],[12] 11.00% [27],[40]
Principal $ 4,000 [11],[12] $ 4,000 [27],[40]
Cost 4,000 [11],[12] 4,000 [27],[40]
Fair value $ 2,086 [11],[12] $ 2,086 [27],[40]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 37 [3] 37 [4]
Cost $ 1,584 [3] $ 1,584 [4]
Fair value $ 3,037 [3] $ 3,320 [4]
Investment, Identifier [Axis]: Barfly Ventures, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 7.00% [3] 7.00% [4]
Principal $ 711 [3] $ 711 [4]
Cost 711 [3] 711 [4]
Fair value $ 711 [3] $ 711 [4]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 4,073 [30] 4,073 [31]
Cost $ 4,095 [30] $ 4,095 [31]
Fair value 6,150 [30] 4,095 [31]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal 0 [32] 0 [28]
Cost (7) [32] (8) [28]
Fair value $ (7) [32] (8) [28]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.00%  
Principal $ 10,575 0 [28]
Cost 10,492 0 [28]
Fair value $ 10,492 $ 0 [28]
Investment, Identifier [Axis]: Batjer TopCo, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 11.00% 11.00%
Principal   $ 11,025
Cost   10,933
Fair value   $ 10,933
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 1,548,387 [3],[30],[41] 1,548,387 [4],[31],[42]
Total Rate 8.00% [3],[30],[41] 8.00% [4],[31],[42]
PIK Rate 8.00% [3],[30],[41] 8.00% [4],[31],[42]
Cost $ 1,184 [3],[30],[41] $ 1,161 [4],[31],[42]
Fair value $ 5,544 [3],[30],[41] $ 4,561 [4],[31],[42]
Investment, Identifier [Axis]: Berry Aviation, Inc., Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 122,416 [3],[30],[32],[41] 122,416 [4],[28],[31],[42]
PIK Rate 16.00% [3],[30],[32],[41] 16.00% [4],[28],[31],[42]
Cost $ 0 [3],[30],[32],[41] $ 0 [4],[28],[31],[42]
Fair value $ 340 [3],[30],[32],[41] $ 270 [4],[28],[31],[42]
Investment, Identifier [Axis]: Berry Aviation, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% [3] 12.00% [4]
PIK Rate 1.50% [3] 1.50% [4]
Principal $ 197 [3] $ 195 [4]
Cost 197 [3] 195 [4]
Fair value $ 197 [3] $ 195 [4]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 7.00% [3],[11],[14],[32] 1.00% [4],[26],[27],[28]
PIK Rate 6.00% [3],[11],[14],[32] 6.00% [4],[26],[27],[28]
Principal $ 0 [3],[11],[14],[32] $ 0 [4],[26],[27],[28]
Cost (72) [3],[11],[14],[32] (76) [4],[26],[27],[28]
Fair value $ (72) [3],[11],[14],[32] $ (76) [4],[26],[27],[28]
Investment, Identifier [Axis]: Bettercloud, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.89% [3],[11],[14] 11.40% [4],[26],[27]
Reference Rate and Spread 7.00% [3],[11],[14] 1.00% [4],[26],[27]
PIK Rate 6.00% [3],[11],[14] 6.00% [4],[26],[27]
Principal $ 27,919 [3],[11],[14] $ 27,505 [4],[26],[27]
Cost 27,456 [3],[11],[14] 27,020 [4],[26],[27]
Fair value $ 27,919 [3],[11],[14] $ 27,505 [4],[26],[27]
Investment, Identifier [Axis]: Binswanger Enterprises, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,050,000 [3] 1,050,000 [4]
Cost $ 1,050 [3] $ 1,050 [4]
Fair value $ 230 [3] $ 420 [4]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 723,184 [9],[30] 723,184 [10],[31]
Cost $ 1 [9],[30] $ 1 [10],[31]
Fair value $ 3,070 [9],[30] $ 4,860 [10],[31]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [9],[11] 15.50%  
Reference Rate and Spread 7.50% [9],[11] 8.50% [10],[27],[28]
PIK Rate [9],[11] 14.50%  
Principal $ 1,211 [9],[11] $ 0 [10],[27],[28]
Cost 1,211 [9],[11] 0 [10],[27],[28]
Fair value $ 1,139 [9],[11] $ 0 [10],[27],[28]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.07% [9],[11] 12.94% [10],[27]
Reference Rate and Spread 8.50% [9],[11] 8.50% [10],[27]
PIK Rate [9],[11] 12.07%  
Principal $ 3,309 [9],[11] $ 3,239 [10],[27]
Cost 2,440 [9],[11] 2,280 [10],[27]
Fair value $ 3,111 [9],[11] $ 3,139 [10],[27]
Investment, Identifier [Axis]: Bluestem Brands, Inc., Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 163,295 [9],[24] 163,295 [10],[25]
Cost $ 1,036 [9],[24] $ 1,036 [10],[25]
Fair value $ 690 [9],[24] $ 1,095 [10],[25]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,160,000 2,160,000 [31]
Cost $ 2,256 $ 2,256 [31]
Fair value $ 2,770 $ 2,970 [31]
Investment, Identifier [Axis]: Boccella Precast Products LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.00% 10.00%
Principal $ 320 $ 320
Cost 320 320
Fair value $ 320 $ 320
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Class B Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 140,000 [30] 140,000 [31]
Total Rate 8.00% [30] 8.00% [31]
Cost $ 14,000 [30] $ 14,000 [31]
Fair value $ 31,420 [30] $ 31,420 [31]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 13.91% [11],[14],[43] 13.39% [26],[27],[44]
Reference Rate and Spread 9.22% [11],[14],[43] 9.26% [26],[27],[44]
Principal $ 98,535 [11],[14],[43] $ 99,194 [26],[27],[44]
Cost 97,952 [11],[14],[43] 98,576 [26],[27],[44]
Fair value $ 98,535 [11],[14],[43] $ 99,194 [26],[27],[44]
Investment, Identifier [Axis]: Bolder Panther Group, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.91%  
Reference Rate and Spread 9.22%  
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.50% [11],[12],[13] 12.50% [4],[27],[33],[40]
Reference Rate and Spread 9.25% [11],[12],[13] 9.25% [4],[27],[33],[40]
Principal $ 761 [11],[12],[13] $ 761 [4],[27],[33],[40]
Cost 761 [11],[12],[13] 761 [4],[27],[33],[40]
Fair value $ 761 [11],[12],[13] $ 761 [4],[27],[33],[40]
Investment, Identifier [Axis]: Brainworks Software, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.50% [11],[12],[13] 12.50% [4],[27],[33],[40]
Reference Rate and Spread 9.25% [11],[12],[13] 9.25% [4],[27],[33],[40]
Principal $ 7,056 [11],[12],[13] $ 7,056 [4],[27],[33],[40]
Cost 7,056 [11],[12],[13] 7,056 [4],[27],[33],[40]
Fair value $ 2,134 [11],[12],[13] $ 2,916 [4],[27],[33],[40]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,950 [30] 2,950 [31]
Cost $ 4,280 [30] $ 4,280 [31]
Fair value $ 6,560 [30] $ 7,080 [31]
Investment, Identifier [Axis]: Brewer Crane Holdings, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 14.66% [11] 14.12% [27]
Reference Rate and Spread 10.00% [11] 10.00% [27]
Principal $ 5,840 [11] $ 5,964 [27]
Cost 5,840 [11] 5,964 [27]
Fair value $ 5,840 [11] $ 5,964 [27]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [30],[41] 17,742  
Cost [30],[41] $ 1,000  
Fair value [30],[41] $ 1,000  
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) [31],[42]   17,742
Cost [31],[42]   $ 1,000
Fair value [31],[42]   $ 1,000
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 13.00% 13.00%
Principal $ 8,813 $ 8,813
Cost 8,813 8,813
Fair value $ 8,813 $ 8,813
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.00% [41] 13.00% [42]
Principal $ 1,000 [41] $ 1,000 [42]
Cost 1,000 [41] 1,000 [42]
Fair value $ 1,000 [41] $ 1,000 [42]
Investment, Identifier [Axis]: Bridge Capital Solutions Corporation, Warrants    
Schedule of Investments [Line Items]    
Units (in shares) 82 [24] 82 [25]
Cost $ 2,132 [24] $ 2,132 [25]
Fair value $ 4,340 [24] $ 4,340 [25]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund III, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 1.55% [5],[6],[45] 1.55% [7],[8],[31],[46]
Cost $ 7,062 [5],[6],[45] $ 7,062 [7],[8],[31],[46]
Fair value $ 4,586 [5],[6],[45] $ 4,727 [7],[8],[31],[46]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund IV, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 0.59% [5],[6],[30],[45] 0.59% [7],[8],[31],[46]
Cost $ 4,350 [5],[6],[30],[45] $ 4,350 [7],[8],[31],[46]
Fair value $ 4,664 [5],[6],[30],[45] $ 4,541 [7],[8],[31],[46]
Investment, Identifier [Axis]: Brightwood Capital Fund Investments, LP Interests (Brightwood Capital Fund V, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 1.31% [5],[6],[45] 1.31% [7],[8],[46]
Cost $ 2,000 [5],[6],[45] $ 2,000 [7],[8],[46]
Fair value $ 2,280 [5],[6],[45] $ 2,229 [7],[8],[46]
Investment, Identifier [Axis]: Buca C, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 6 6
Total Rate 6.00% 6.00%
PIK Rate 6.00% 6.00%
Cost $ 4,770 $ 4,770
Fair value $ 0 $ 0
Investment, Identifier [Axis]: Buca C, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% 9.00%
Principal $ 16,980 $ 17,355
Cost 16,980 17,355
Fair value $ 11,962 $ 12,337
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 9.83%  
Reference Rate and Spread 5.00% [3],[11] 5.00% [4],[27],[28]
Principal $ 774 [3],[11] $ 0 [4],[27],[28]
Cost 749 [3],[11] (28) [4],[27],[28]
Fair value $ 774 [3],[11] $ 0 [4],[27],[28]
Investment, Identifier [Axis]: Burning Glass Intermediate Holding Company, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 9.63% [3],[11] 8.91% [4],[27]
Reference Rate and Spread 5.00% [3],[11] 5.00% [4],[27]
Principal $ 19,832 [3],[11] $ 19,933 [4],[27]
Cost 19,568 [3],[11] 19,656 [4],[27]
Fair value $ 19,832 [3],[11] $ 19,933 [4],[27]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 1    
Schedule of Investments [Line Items]    
Units (in shares) 1,788,527 1,788,527 [31]
Cost $ 1,789 $ 1,789 [31]
Fair value $ 1,789 $ 1,789 [31]
Investment, Identifier [Axis]: CAI Software LLC, Preferred Equity 2    
Schedule of Investments [Line Items]    
Units (in shares) 596,176 596,176
Cost $ 0 $ 0
Fair value $ 0 $ 0
Investment, Identifier [Axis]: CBT Nuggets, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 416 [30] 416 [31]
Cost $ 1,300 [30] $ 1,300 [31]
Fair value $ 49,860 [30] $ 49,002 [31]
Investment, Identifier [Axis]: CMS Minerals Investments, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 100 [30],[41] 100 [31],[42]
Cost $ 1,300 [30],[41] $ 1,304 [31],[42]
Fair value $ 1,235 [30],[41] $ 1,670 [31],[42]
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [4],[27],[47]   11.99%
Reference Rate and Spread [4],[27],[47]   8.50%
PIK Rate [4],[27],[47]   0.01%
Principal [4],[27],[47]   $ 28,328
Cost [4],[27],[47]   28,264
Fair value [4],[27],[47]   $ 28,328
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 13.14%  
Reference Rate and Spread [3],[11] 6.50%  
PIK Rate [3],[11] 2.00%  
Principal [3],[11] $ 14,373  
Cost [3],[11] 14,351  
Fair value [3],[11] $ 14,373  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 13.14%  
Reference Rate and Spread [3],[11] 6.50%  
PIK Rate [3],[11] 2.00%  
Principal [3],[11] $ 4,472  
Cost [3],[11] 4,465  
Fair value [3],[11] $ 4,472  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 13.33%  
Reference Rate and Spread [3],[11] 6.50%  
PIK Rate [3],[11] 2.00%  
Principal [3],[11] $ 5,883  
Cost [3],[11] 5,873  
Fair value [3],[11] $ 5,883  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 4    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 13.23%  
Reference Rate and Spread [3],[11] 6.50%  
PIK Rate [3],[11] 2.00%  
Principal [3],[11] $ 1,687  
Cost [3],[11] 1,685  
Fair value [3],[11] $ 1,687  
Investment, Identifier [Axis]: Cadence Aerospace LLC, Secured Debt 5    
Schedule of Investments [Line Items]    
Total Rate [3],[11] 13.33%  
Reference Rate and Spread [3],[11] 6.50%  
PIK Rate [3],[11] 2.00%  
Principal [3],[11] $ 2,476  
Cost [3],[11] 2,472  
Fair value [3],[11] $ 2,476  
Investment, Identifier [Axis]: Café Brazil, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,233 [30] 1,233 [31]
Cost $ 1,742 [30] $ 1,742 [31]
Fair value $ 1,840 [30] $ 2,210 [31]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 6,157 [30] 6,157 [31]
Cost $ 10,775 [30] $ 10,775 [31]
Fair value $ 25,495 [30] $ 25,495 [31]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Preferred Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 3,671 [30] 3,671 [31]
Total Rate 15.00% [30] 15.00% [31]
PIK Rate 15.00% [30] 15.00% [31]
Cost $ 4,144 [30] $ 3,994 [31]
Fair value $ 4,144 [30] $ 3,994 [31]
Investment, Identifier [Axis]: California Splendor Holdings LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 14.88% [11] 13.75% [27]
Reference Rate and Spread 10.00% [11] 10.00% [27]
Principal $ 28,000 [11] $ 28,000 [27]
Cost 27,954 [11] 27,951 [27]
Fair value $ 28,000 [11] $ 28,000 [27]
Investment, Identifier [Axis]: Camin Cargo Control, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 11.34% [9],[11],[14] 10.88% [10],[27]
Reference Rate and Spread 6.50% [9],[11],[14] 6.50% [10],[27]
Principal $ 15,178 [9],[11],[14] $ 15,218 [10],[27]
Cost 15,079 [9],[11],[14] 15,110 [10],[27]
Fair value $ 14,646 [9],[11],[14] $ 14,685 [10],[27]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 450,000 450,000
Cost $ 4,500 $ 4,500
Fair value $ 4,500 $ 4,500
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 6.00% [11],[32] 6.00% [27],[28]
Principal $ 0 [11],[32] $ 0 [27],[28]
Cost (9) [11],[32] (9) [27],[28]
Fair value $ (9) [11],[32] $ (9) [27],[28]
Investment, Identifier [Axis]: Career Team Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.50% 12.50%
Principal $ 20,250 $ 20,250
Cost 20,100 20,090
Fair value $ 20,100 $ 20,090
Investment, Identifier [Axis]: CaseWorthy, Inc., Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 245,926 [3] 245,926 [4]
Cost $ 246 [3] $ 246 [4]
Fair value $ 246 [3] $ 246 [4]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 6.00% [3],[11],[32] 6.00% [4],[27],[28]
Principal $ 0 [3],[11],[32] $ 0 [4],[27],[28]
Cost (10) [3],[11],[32] (11) [4],[27],[28]
Fair value $ (10) [3],[11],[32] $ (11) [4],[27],[28]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.73% [3],[11] 10.73% [4],[27]
Reference Rate and Spread 6.00% [3],[11] 6.00% [4],[27]
Principal $ 7,993 [3],[11] $ 7,993 [4],[27]
Cost 7,919 [3],[11] 7,914 [4],[27]
Fair value $ 7,919 [3],[11] $ 7,914 [4],[27]
Investment, Identifier [Axis]: CaseWorthy, Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 10.73% [3],[11] 10.48% [4],[27]
Reference Rate and Spread 6.00% [3],[11] 5.75% [4],[27]
Principal $ 6,133 [3],[11] $ 6,133 [4],[27]
Cost 6,083 [3],[11] 6,079 [4],[27]
Fair value $ 6,133 [3],[11] $ 6,133 [4],[27]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 13,309 13,309
Cost $ 6,122 $ 6,122
Fair value $ 9,260 $ 8,700
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 9.00% [11],[32] 9.00% [27],[28]
Principal $ 0 [11],[32] $ 0 [27],[28]
Cost 0 [11],[32] 0 [27],[28]
Fair value $ 0 [11],[32] $ 0 [27],[28]
Investment, Identifier [Axis]: Centre Technologies Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.75% [11] 13.13% [27]
Reference Rate and Spread 9.00% [11] 9.00% [27]
Principal $ 15,030 [11] $ 15,030 [27]
Cost 14,960 [11] 14,954 [27]
Fair value $ 14,960 [11] $ 14,954 [27]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 4,347 [30] 4,347 [31]
Cost $ 11,440 [30] $ 11,440 [31]
Fair value $ 22,800 [30] $ 22,920 [31]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 1,047,146 [30],[41] 1,047,146 [31],[42]
Cost $ 1,773 [30],[41] $ 1,773 [31],[42]
Fair value $ 2,830 [30],[41] $ 2,710 [31],[42]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 6.00% [11],[14],[32] 6.00% [27],[28]
Principal $ 0 [11],[14],[32] $ 0 [27],[28]
Cost 0 [11],[14],[32] 0 [27],[28]
Fair value $ 0 [11],[14],[32] $ 0 [27],[28]
Investment, Identifier [Axis]: Chamberlin Holding LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.86% [11],[14] 12.13% [27]
Reference Rate and Spread 8.00% [11],[14] 8.00% [27]
Principal $ 16,945 [11],[14] $ 16,945 [27]
Cost 16,940 [11],[14] 16,935 [27]
Fair value $ 16,945 [11],[14] $ 16,945 [27]
Investment, Identifier [Axis]: Chandler Signs Holdings, LLC, Class A Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,500,000 [3] 1,500,000 [4]
Cost $ 1,500 [3] $ 1,500 [4]
Fair value $ 2,000 [3] $ 1,790 [4]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 11.06% [3],[11],[14],[48] 10.72% [4],[26],[27],[49]
Reference Rate and Spread 6.25% [3],[11],[14],[48] 6.25% [4],[26],[27],[49]
Principal $ 1,868 [3],[11],[14],[48] $ 1,868 [4],[26],[27],[49]
Cost 1,773 [3],[11],[14],[48] 1,767 [4],[26],[27],[49]
Fair value $ 1,830 [3],[11],[14],[48] $ 1,841 [4],[26],[27],[49]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.08% [3],[11],[14],[48] 10.71% [4],[26],[27],[50]
Reference Rate and Spread 6.25% [3],[11],[14],[48] 6.25% [4],[26],[27],[50]
Principal $ 38,918 [3],[11],[14],[48] $ 39,047 [4],[26],[27],[50]
Cost 38,307 [3],[11],[14],[48] 38,396 [4],[26],[27],[50]
Fair value $ 38,110 [3],[11],[14],[48] $ 38,484 [4],[26],[27],[50]
Investment, Identifier [Axis]: Channel Partners Intermediateco, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate [3],[11],[14] 11.14%  
Reference Rate and Spread [3],[11],[14] 6.25%  
Principal [3],[11],[14] $ 4,930  
Cost [3],[11],[14] 4,804  
Fair value [3],[11],[14] $ 4,828  
Investment, Identifier [Axis]: Charps, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,829 [30] 1,829 [31]
Cost $ 1,963 [30] $ 1,963 [31]
Fair value $ 13,550 [30] $ 13,340 [31]
Investment, Identifier [Axis]: Charps, LLC, Unsecured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.00% 10.00%
Principal $ 5,694 $ 5,694
Cost 4,652 4,643
Fair value $ 5,694 $ 5,694
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 1    
Schedule of Investments [Line Items]    
Units (in shares) 717 [30] 717 [31]
Cost $ 7,280 [30] $ 7,280 [31]
Fair value $ 7,170 [30] $ 8,220 [31]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) 800 [41] 800 [42]
Cost $ 210 [41] $ 210 [42]
Fair value $ 830 [41] $ 610 [42]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 9.00% [11],[14],[32] 9.00% [26],[27],[28]
Principal $ 0 [11],[14],[32] $ 0 [26],[27],[28]
Cost 0 [11],[14],[32] 0 [26],[27],[28]
Fair value $ 0 [11],[14],[32] $ 0 [26],[27],[28]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.79% [11],[14] 13.23% [26],[27]
Reference Rate and Spread 9.00% [11],[14] 9.00% [26],[27]
Principal $ 10,000 [11],[14] $ 10,480 [26],[27]
Cost 9,971 [11],[14] 10,440 [26],[27]
Fair value $ 9,971 [11],[14] $ 10,440 [26],[27]
Investment, Identifier [Axis]: Clad-Rex Steel, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 10.00% 10.00%
Principal $ 1,040 $ 1,049
Cost 1,031 1,039
Fair value $ 1,031 $ 1,039
Investment, Identifier [Axis]: Clarius BIGS, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 15.00% [3],[12],[13] 15.00% [4],[33],[40]
PIK Rate 15.00% [3],[12],[13] 15.00% [4],[33],[40]
Principal $ 2,696 [3],[12],[13] $ 2,712 [4],[33],[40]
Cost 2,696 [3],[12],[13] 2,712 [4],[33],[40]
Fair value $ 25 [3],[12],[13] $ 19 [4],[33],[40]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 154 [30] 154 [31]
Cost $ 5,760 [30] $ 5,760 [31]
Fair value $ 25,700 [30] $ 24,637 [31]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.88% [11] 9.75% [27]
Reference Rate and Spread 6.00% [11] 6.00% [27]
Principal $ 4,560 [11] $ 4,560 [27]
Cost 4,560 [11] 4,560 [27]
Fair value $ 4,560 [11] $ 4,560 [27]
Investment, Identifier [Axis]: Classic H&G Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 8.00% 8.00%
Principal $ 19,274 $ 19,274
Cost 19,192 19,182
Fair value $ 19,274 $ 19,274
Investment, Identifier [Axis]: Cody Pools, Inc., Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 587 [30],[41] 587 [31],[42]
Cost $ 8,317 [30],[41] $ 8,317 [31],[42]
Fair value $ 59,150 [30],[41] $ 58,180 [31],[42]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 15.50% [11] 15.38% [27]
Reference Rate and Spread 10.50% [11] 10.50% [27]
Principal $ 1,054 [11] $ 1,462 [27]
Cost 1,024 [11] 1,443 [27]
Fair value $ 1,054 [11] $ 1,462 [27]
Investment, Identifier [Axis]: Cody Pools, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 15.50% [11] 15.38% [27]
Reference Rate and Spread 10.50% [11] 10.50% [27]
Principal $ 40,377 [11] $ 40,801 [27]
Cost 40,117 [11] 40,521 [27]
Fair value $ 40,377 [11] $ 40,801 [27]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 17,280 17,280 [31]
Cost $ 7,680 $ 7,680 [31]
Fair value 8,200 9,160 [31]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Principal 0 [32] 0 [28]
Cost 0 [32] 0 [28]
Fair value $ 0 [32] $ 0 [28]
Investment, Identifier [Axis]: Colonial Electric Company LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 22,995 $ 23,310
Cost 22,850 23,151
Fair value $ 22,850 $ 23,151
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 1,975 [30] 1,975 [31]
Cost $ 1,975 [30] $ 1,975 [31]
Fair value $ 18,440 [30] $ 19,830 [31]
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate [11] 13.75%  
Reference Rate and Spread [11] 9.00%  
Principal [11] $ 4,869  
Cost [11] 4,862  
Fair value [11] $ 4,869  
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 9.00% 9.00% [27],[28],[40]
Principal [27],[28],[40]   $ 0
Cost [27],[28],[40]   0
Fair value [27],[28],[40]   $ 0
Investment, Identifier [Axis]: CompareNetworks Topco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.75% 13.13% [27]
Reference Rate and Spread 9.00% 9.00% [27]
Principal [27]   $ 5,241
Cost [27]   5,232
Fair value [27]   $ 5,241
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.34% [3],[11],[51] 12.56% [4],[27],[52]
Reference Rate and Spread 7.50% [3],[11],[51] 8.00% [4],[27],[52]
Principal $ 5,000 [3],[11],[51] $ 5,000 [4],[27],[52]
Cost 4,933 [3],[11],[51] 4,928 [4],[27],[52]
Fair value $ 4,559 [3],[11],[51] $ 4,621 [4],[27],[52]
Investment, Identifier [Axis]: Computer Data Source, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.35% [3],[11] 12.56% [4],[27]
Reference Rate and Spread 7.50% [3],[11] 8.00% [4],[27]
Principal $ 18,588 [3],[11] $ 18,588 [4],[27]
Cost 18,334 [3],[11] 18,315 [4],[27]
Fair value $ 16,948 [3],[11] $ 17,178 [4],[27]
Investment, Identifier [Axis]: Congruent Credit Opportunities Funds, LP Interests (Congruent Credit Opportunities Fund III, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 13.32% [5],[6],[30],[45] 13.32% [7],[8],[31],[46]
Cost $ 7,220 [5],[6],[30],[45] $ 8,096 [7],[8],[31],[46]
Fair value $ 6,781 [5],[6],[30],[45] $ 7,657 [7],[8],[31],[46]
Investment, Identifier [Axis]: Construction Supply Investments, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 861,618 [3] 861,618 [4],[31]
Cost $ 3,335 [3] $ 3,335 [4],[31]
Fair value $ 23,650 [3] $ 21,165 [4],[31]
Investment, Identifier [Axis]: Copper Trail Fund Investments, LP Interests (CTMH, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 38.75% [5],[6],[45] 38.75% [7],[8],[46]
Cost $ 588 [5],[6],[45] $ 588 [7],[8],[46]
Fair value $ 588 [5],[6],[45] $ 588 [7],[8],[46]
Investment, Identifier [Axis]: DMA Industries, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 5,944 5,944
Cost $ 5,944 $ 5,944
Fair value $ 7,260 $ 7,260
Investment, Identifier [Axis]: DMA Industries, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 21,200 $ 21,200
Cost 21,046 21,035
Fair value $ 21,200 $ 21,200
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class A Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 776,316 [3] 776,316 [4]
Total Rate 8.00% [3] 8.00% [4]
PIK Rate 8.00% [3] 8.00% [4]
Cost $ 776 [3] $ 776 [4]
Fair value $ 380 [3] $ 380 [4]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Class AA Preferred Member Units (non-voting)    
Schedule of Investments [Line Items]    
Total Rate 10.00% [3],[30] 10.00% [4],[31]
PIK Rate 10.00% [3],[30] 10.00% [4],[31]
Cost $ 1,190 [3],[30] $ 1,161 [4],[31]
Fair value $ 1,190 [3],[30] $ 1,161 [4],[31]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 7.50% [3],[11],[32] 7.50% [4],[27],[28]
Principal $ 0 [3],[11],[32] $ 0 [4],[27],[28]
Cost 0 [3],[11],[32] (1) [4],[27],[28]
Fair value $ 0 [3],[11],[32] $ (1) [4],[27],[28]
Investment, Identifier [Axis]: DTE Enterprises, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.44% [3],[11] 12.24% [4],[27]
Reference Rate and Spread 7.50% [3],[11] 7.50% [4],[27]
Principal $ 5,634 [3],[11] $ 6,074 [4],[27]
Cost 5,632 [3],[11] 6,065 [4],[27]
Fair value $ 5,634 [3],[11] $ 5,934 [4],[27]
Investment, Identifier [Axis]: Dalton US Inc., Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 201 [3] 201 [4]
Cost $ 201 [3] $ 201 [4]
Fair value $ 201 [3] $ 201 [4]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.33% [3],[11],[14],[53] 11.90% [4],[26],[27]
Reference Rate and Spread 7.50% [3],[11],[14],[53] 8.00% [4],[26],[27]
Principal $ 3,212 [3],[11],[14],[53] $ 1,092 [4],[26],[27]
Cost 3,003 [3],[11],[14],[53] 871 [4],[26],[27]
Fair value $ 3,129 [3],[11],[14],[53] $ 1,077 [4],[26],[27]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Reference Rate and Spread 7.50% [3],[11],[14],[32] 8.00% [4],[26],[27],[28]
Principal $ 0 [3],[11],[14],[32] $ 0 [4],[26],[27],[28]
Cost (70) [3],[11],[14],[32] (74) [4],[26],[27],[28]
Fair value $ (70) [3],[11],[14],[32] $ (74) [4],[26],[27],[28]
Investment, Identifier [Axis]: Dalton US Inc., Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.26% [3],[11],[14] 12.56% [4],[26],[27]
Reference Rate and Spread 7.50% [3],[11],[14] 8.00% [4],[26],[27]
Principal $ 14,317 [3],[11],[14] $ 14,389 [4],[26],[27]
Cost 14,068 [3],[11],[14] 14,125 [4],[26],[27]
Fair value $ 13,944 [3],[11],[14] $ 14,186 [4],[26],[27]
Investment, Identifier [Axis]: Datacom, LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 9,000 [30] 9,000 [31]
Cost $ 2,610 [30] $ 2,610 [31]
Fair value $ 2,670 [30] $ 2,670 [31]
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 7.50% 7.50%
Principal $ 450 $ 223
Cost 450 223
Fair value $ 450 $ 223
Investment, Identifier [Axis]: Datacom, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 10.00% 7.50%
Principal $ 8,555 $ 8,622
Cost 8,161 8,190
Fair value $ 7,761 $ 7,789
Investment, Identifier [Axis]: Digital Products Holdings LLC, Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 3,857 [30] 3,857 [31]
Cost $ 9,501 [30] $ 9,501 [31]
Fair value $ 9,835 [30] $ 9,835 [31]
Investment, Identifier [Axis]: Digital Products Holdings LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 14.75% [11] 14.13% [27]
Reference Rate and Spread 10.00% [11] 10.00% [27]
Principal $ 15,203 [11] $ 15,533 [27]
Cost 15,203 [11] 15,523 [27]
Fair value $ 15,203 [11] $ 15,523 [27]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Preferred Stock    
Schedule of Investments [Line Items]    
Units (in shares) 8,400 [30] 8,400 [31]
Cost $ 8,400 [30] $ 8,400 [31]
Fair value 21,700 [30] $ 22,220 [31]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread [27],[28]   11.00%
Principal 0 [32] $ 0 [27],[28]
Cost (81) [32] (88) [27],[28]
Fair value $ 0 [32] $ 0 [27],[28]
Investment, Identifier [Axis]: Direct Marketing Solutions, Inc., Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 14.00% 15.13% [27]
Reference Rate and Spread [27]   11.00%
Principal $ 26,876 $ 27,267 [27]
Cost 26,744 27,122 [27]
Fair value $ 26,876 $ 27,267 [27]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners - A, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 6.43% [5],[6],[45] 6.43% [7],[8],[46]
Cost $ 2,051 [5],[6],[45] $ 2,051 [7],[8],[46]
Fair value $ 2,898 [5],[6],[45] $ 2,898 [7],[8],[46]
Investment, Identifier [Axis]: Dos Rios Partners, LP Interests (Dos Rios Partners, LP)    
Schedule of Investments [Line Items]    
Units (percentage) 20.24% [5],[6],[45] 20.24% [7],[8],[46]
Cost $ 6,459 [5],[6],[45] $ 6,459 [7],[8],[46]
Fair value $ 9,283 [5],[6],[45] $ 9,127 [7],[8],[46]
Investment, Identifier [Axis]: Dos Rios Stone Products LLC, Class A Preferred Units    
Schedule of Investments [Line Items]    
Units (in shares) 2,000,000 [3],[41] 2,000,000 [4],[42]
Cost $ 2,000 [3],[41] $ 2,000 [4],[42]
Fair value $ 1,580 [3],[41] $ 1,330 [4],[42]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Common Equity    
Schedule of Investments [Line Items]    
Units (in shares) 1,250,000 [3] 1,250,000 [4]
Cost $ 0 [3] $ 0 [4]
Fair value $ 0 [3] $ 0 [4]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 1    
Schedule of Investments [Line Items]    
Units (in shares) 125,000 [3] 125,000 [4]
Cost $ 128 [3] $ 128 [4]
Fair value $ 128 [3] $ 128 [4]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Preferred Equity 2    
Schedule of Investments [Line Items]    
Units (in shares) 2,376,241 [3] 2,376,241 [4]
Cost $ 0 [3] $ 0 [4]
Fair value $ 0 [3] $ 0 [4]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 9.18% [3],[11],[14] 9.18% [4],[26],[27]
Reference Rate and Spread 4.50% [3],[11],[14] 4.50% [4],[26],[27]
PIK Rate 9.18% [3],[11],[14] 9.18% [4],[26],[27]
Principal $ 1,875 [3],[11],[14] $ 1,875 [4],[26],[27]
Cost 1,717 [3],[11],[14] 1,717 [4],[26],[27]
Fair value $ 1,717 [3],[11],[14] $ 1,717 [4],[26],[27]
Investment, Identifier [Axis]: Dynamic Communities, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.18% [3],[11],[14] 11.18% [4],[26],[27]
Reference Rate and Spread 6.50% [3],[11],[14] 6.50% [4],[26],[27]
PIK Rate 11.18% [3],[11],[14] 11.18% [4],[26],[27]
Principal $ 1,875 [3],[11],[14] $ 1,875 [4],[26],[27]
Cost 1,642 [3],[11],[14] 1,642 [4],[26],[27]
Fair value $ 1,642 [3],[11],[14] $ 1,642 [4],[26],[27]
Investment, Identifier [Axis]: EIG Fund Investments, LP Interests (EIG Global Private Debt Fund-A, L.P.)    
Schedule of Investments [Line Items]    
Units (in shares) 5,000,000 [5],[6],[30],[45] 5,000,000 [7],[8],[31],[46]
Cost $ 1,023 [5],[6],[30],[45] $ 1,060 [7],[8],[31],[46]
Fair value $ 976 [5],[6],[30],[45] $ 1,013 [7],[8],[31],[46]
Investment, Identifier [Axis]: EPIC Y-Grade Services, LP, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.96% [9],[11] 10.70% [10],[27]
Reference Rate and Spread 6.00% [9],[11] 6.00% [10],[27]
Principal $ 6,806 [9],[11] $ 6,823 [10],[27]
Cost 6,750 [9],[11] 6,764 [10],[27]
Fair value $ 5,963 [9],[11] $ 6,141 [10],[27]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.95% [3],[11],[14] 11.73% [4],[27]
Reference Rate and Spread 8.00% [3],[11],[14] 7.00% [4],[27]
Principal $ 3,495 [3],[11],[14] $ 3,346 [4],[27]
Cost 3,443 [3],[11],[14] 3,290 [4],[27]
Fair value $ 3,384 [3],[11],[14] $ 3,276 [4],[27]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.95% [3],[11],[14] 11.73% [4],[27]
Reference Rate and Spread 8.00% [3],[11],[14] 7.00% [4],[27]
Principal $ 4,989 [3],[11],[14] $ 5,021 [4],[27]
Cost 4,940 [3],[11],[14] 4,967 [4],[27]
Fair value $ 4,830 [3],[11],[14] $ 4,916 [4],[27]
Investment, Identifier [Axis]: Eastern Wholesale Fence LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 12.95% [3],[11],[14] 11.73% [4],[27]
Reference Rate and Spread 8.00% [3],[11],[14] 7.00% [4],[27]
Principal $ 23,305 [3],[11],[14] $ 23,456 [4],[27]
Cost 23,027 [3],[11],[14] 23,149 [4],[27]
Fair value $ 22,564 [3],[11],[14] $ 22,967 [4],[27]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 1    
Schedule of Investments [Line Items]    
Units (in shares) 378 378
Cost $ 7,603 $ 7,603
Fair value $ 7,603 $ 7,603
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Common Stock 2    
Schedule of Investments [Line Items]    
Units (in shares) 939 [41] 939 [42]
Cost $ 1,558 [41] $ 1,558 [42]
Fair value $ 1,558 [41] $ 1,558 [42]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 6.00% [11],[14],[32] 6.00% [26],[27],[28]
Principal $ 0 [11],[14],[32] $ 0 [26],[27],[28]
Cost (8) [11],[14],[32] (9) [26],[27],[28]
Fair value $ (8) [11],[14],[32] $ (9) [26],[27],[28]
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.00% 12.00%
Principal $ 18,773 $ 18,773
Cost 18,604 18,594
Fair value $ 18,604 $ 18,594
Investment, Identifier [Axis]: Elgin AcquireCo, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 9.00% 9.00%
Principal $ 6,346 $ 6,357
Cost 6,284 6,294
Fair value $ 6,284 $ 6,294
Investment, Identifier [Axis]: Emerald Technologies Acquisition Co, Inc., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 10.97% [9],[11],[14] 10.67% [10],[26],[27]
Reference Rate and Spread 6.25% [9],[11],[14] 6.25% [10],[26],[27]
Principal $ 9,199 [9],[11],[14] $ 9,258 [10],[26],[27]
Cost 9,049 [9],[11],[14] 9,099 [10],[26],[27]
Fair value $ 8,739 [9],[11],[14] $ 8,787 [10],[26],[27]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund IX, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [5],[6],[30],[45] 0.10%  
Total Rate [7],[8],[31],[46]   0.10%
Cost $ 3,682 [5],[6],[30],[45] $ 3,699 [7],[8],[31],[46]
Fair value $ 2,148 [5],[6],[30],[45] $ 2,019 [7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII Co-Investors, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [5],[6],[30],[45] 0.38%  
Total Rate [7],[8],[31],[46]   0.38%
Cost $ 1,979 [5],[6],[30],[45] $ 1,984 [7],[8],[31],[46]
Fair value $ 950 [5],[6],[30],[45] $ 1,037 [7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund VIII, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [5],[6],[30],[45] 0.14%  
Total Rate [7],[8],[31],[46]   0.14%
Cost $ 3,565 [5],[6],[30],[45] $ 3,566 [7],[8],[31],[46]
Fair value $ 2,091 [5],[6],[30],[45] $ 2,092 [7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Energy Capital Fund X, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [5],[6],[30],[45] 0.15%  
Total Rate [7],[8],[31],[46]   0.15%
Cost $ 8,165 [5],[6],[30],[45] $ 8,236 [7],[8],[31],[46]
Fair value $ 9,362 [5],[6],[30],[45] $ 9,351 [7],[8],[31],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund II, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [5],[6],[45] 0.84%  
Total Rate [7],[8],[46]   0.84%
Cost $ 5,358 [5],[6],[45] $ 5,358 [7],[8],[46]
Fair value $ 1,688 [5],[6],[45] $ 1,688 [7],[8],[46]
Investment, Identifier [Axis]: EnCap Energy Fund Investments, LP Interests (EnCap Flatrock Midstream Fund III, L.P.)    
Schedule of Investments [Line Items]    
Units (percentage) [5],[6],[30],[45] 0.25%  
Total Rate [7],[8],[31],[46]   0.25%
Cost $ 5,749 [5],[6],[30],[45] $ 6,023 [7],[8],[31],[46]
Fair value $ 6,062 [5],[6],[30],[45] $ 5,718 [7],[8],[31],[46]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 11.43% [3],[11],[14] 11.68% [4],[26],[27]
Reference Rate and Spread 6.50% [3],[11],[14] 6.50% [4],[26],[27]
Principal $ 983 [3],[11],[14] $ 131 [4],[26],[27]
Cost 940 [3],[11],[14] 85 [4],[26],[27]
Fair value $ 976 [3],[11],[14] $ 131 [4],[26],[27]
Investment, Identifier [Axis]: Engineering Research & Consulting, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.43% [3],[11],[14] 10.92% [4],[26],[27]
Reference Rate and Spread 6.50% [3],[11],[14] 6.50% [4],[26],[27]
Principal $ 16,256 [3],[11],[14] $ 16,338 [4],[26],[27]
Cost 15,980 [3],[11],[14] 16,047 [4],[26],[27]
Fair value $ 16,138 [3],[11],[14] $ 16,338 [4],[26],[27]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 11.73% [3],[11],[14],[41] 10.67% [4],[27],[42]
Reference Rate and Spread 7.00% [3],[11],[14],[41] 7.00% [4],[27],[42]
Principal $ 3,692 [3],[11],[14],[41] $ 3,692 [4],[27],[42]
Cost 3,665 [3],[11],[14],[41] 3,663 [4],[27],[42]
Fair value $ 3,504 [3],[11],[14],[41] $ 3,507 [4],[27],[42]
Investment, Identifier [Axis]: Event Holdco, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.73% [3],[11],[14],[41] 10.67% [4],[27],[42]
Reference Rate and Spread 7.00% [3],[11],[14],[41] 7.00% [4],[27],[42]
Principal $ 44,308 [3],[11],[14],[41] $ 44,308 [4],[27],[42]
Cost 43,977 [3],[11],[14],[41] 43,955 [4],[27],[42]
Fair value $ 42,045 [3],[11],[14],[41] $ 42,083 [4],[27],[42]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Preferred Equity    
Schedule of Investments [Line Items]    
Units (in shares) 9,360 [30] 9,360 [31]
Cost $ 10,400 [30] $ 10,400 [31]
Fair value $ 21,190 [30] $ 17,580 [31]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 11.25% [11] 10.75% [27]
Reference Rate and Spread 6.50% [11] 6.50% [27]
Principal $ 7,600 [11] $ 7,600 [27]
Cost 7,544 [11] 7,537 [27]
Fair value $ 7,600 [11] $ 7,600 [27]
Investment, Identifier [Axis]: Flame King Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 13.75% [11] 13.25% [27]
Reference Rate and Spread 9.00% [11] 9.00% [27]
Principal $ 21,200 [11] $ 21,200 [27]
Cost 21,048 [11] 21,038 [27]
Fair value $ 21,200 [11] $ 21,200 [27]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 12.55% [3],[11],[14] 11.21% [4],[26],[27]
Reference Rate and Spread 7.50% [3],[11],[14] 7.50% [4],[26],[27]
Principal $ 982 [3],[11],[14] $ 736 [4],[26],[27]
Cost 982 [3],[11],[14] 736 [4],[26],[27]
Fair value $ 982 [3],[11],[14] $ 736 [4],[26],[27]
Investment, Identifier [Axis]: Flip Electronics LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.55% [3],[11],[14] 12.19% [4],[26],[27]
Reference Rate and Spread 7.50% [3],[11],[14] 7.50% [4],[26],[27]
Principal $ 11,095 [3],[11],[14] $ 11,095 [4],[26],[27]
Cost 10,872 [3],[11],[14] 10,852 [4],[26],[27]
Fair value $ 11,095 [3],[11],[14] $ 11,095 [4],[26],[27]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport Financial SBIC Fund LP)    
Schedule of Investments [Line Items]    
Units (percentage) 9.30% [5],[6],[45] 9.30% [7],[8],[46]
Cost $ 3,507 [5],[6],[45] $ 3,507 [7],[8],[46]
Fair value $ 3,483 [5],[6],[45] $ 3,483 [7],[8],[46]
Investment, Identifier [Axis]: Freeport Financial Funds, LP Interests (Freeport First Lien Loan Fund III LP)    
Schedule of Investments [Line Items]    
Units (percentage) 5.95% [5],[6],[30],[45] 5.95% [7],[8],[31],[46]
Cost $ 5,767 [5],[6],[30],[45] $ 6,303 [7],[8],[31],[46]
Fair value $ 5,312 [5],[6],[30],[45] $ 5,848 [7],[8],[31],[46]
Investment, Identifier [Axis]: Fuse, LLC, Common Stock    
Schedule of Investments [Line Items]    
Units (in shares) 10,429 [9] 10,429 [10]
Cost $ 256 [9] $ 256 [10]
Fair value $ 0 [9] $ 0 [10]
Investment, Identifier [Axis]: Fuse, LLC, Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 12.00% [9] 12.00% [10]
Principal $ 1,810 [9] $ 1,810 [10]
Cost 1,810 [9] 1,810 [10]
Fair value $ 1,512 [9] $ 1,512 [10]
Investment, Identifier [Axis]: GFG Group, LLC., Preferred Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 226 [30] 226 [31]
Cost $ 4,900 [30] $ 4,900 [31]
Fair value $ 7,590 [30] $ 7,140 [31]
Investment, Identifier [Axis]: GFG Group, LLC., Secured Debt    
Schedule of Investments [Line Items]    
Total Rate 9.00% 9.00%
Principal $ 11,345 $ 11,345
Cost 11,275 11,269
Fair value $ 11,345 $ 11,345
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) [31]   5,879
Cost [31]   $ 13,065
Fair value [31]   $ 44,440
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Member Units 2    
Schedule of Investments [Line Items]    
Units (in shares) [30] 5,879  
Cost [30] $ 13,065  
Fair value [30] $ 44,440  
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.66% 10.12%
Reference Rate and Spread 6.00% 6.00%
Principal $ 965 $ 670
Cost 965 670
Fair value $ 965 $ 670
Investment, Identifier [Axis]: GRT Rubber Technologies LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 12.66% 12.12%
Reference Rate and Spread 8.00% 8.00%
Principal $ 40,493 $ 40,493
Cost 40,324 40,313
Fair value $ 40,493 $ 40,493
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 11.46% [3],[11] 11.20% [4],[27]
Reference Rate and Spread 6.50% [3],[11] 6.50% [4],[27]
Principal $ 1,136 [3],[11] $ 2,177 [4],[27]
Cost 1,129 [3],[11] 2,169 [4],[27]
Fair value $ 1,132 [3],[11] $ 2,171 [4],[27]
Investment, Identifier [Axis]: GS HVAM Intermediate, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.46% [3],[11] 11.24% [4],[27]
Reference Rate and Spread 6.50% [3],[11] 6.50% [4],[27]
Principal $ 10,707 [3],[11] $ 10,734 [4],[27]
Cost 10,673 [3],[11] 10,695 [4],[27]
Fair value $ 10,683 [3],[11] $ 10,705 [4],[27]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Total Rate 10.99% [3],[11],[14],[54] 10.42% [4],[26],[27]
Reference Rate and Spread 6.00% [3],[11],[14],[54] 6.00% [4],[26],[27]
Principal $ 353 [3],[11],[14],[54] $ 252 [4],[26],[27]
Cost 335 [3],[11],[14],[54] 233 [4],[26],[27]
Fair value $ 353 [3],[11],[14],[54] $ 252 [4],[26],[27]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate [3],[11],[14] 11.11%  
Reference Rate and Spread 6.00% [3],[11],[14] 6.00% [4],[26],[27],[28]
Principal $ 303 [3],[11],[14] $ 0 [4],[26],[27],[28]
Cost 286 [3],[11],[14] (15) [4],[26],[27],[28]
Fair value $ 286 [3],[11],[14] $ (15) [4],[26],[27],[28]
Investment, Identifier [Axis]: GULF PACIFIC ACQUISITION, LLC, Secured Debt 3    
Schedule of Investments [Line Items]    
Total Rate 10.58% [3],[11],[14] 10.73% [4],[26],[27]
Reference Rate and Spread 6.00% [3],[11],[14] 6.00% [4],[26],[27]
Principal $ 3,642 [3],[11],[14] $ 3,661 [4],[26],[27]
Cost 3,576 [3],[11],[14] 3,591 [4],[26],[27]
Fair value $ 3,642 [3],[11],[14] $ 3,661 [4],[26],[27]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Member Units    
Schedule of Investments [Line Items]    
Units (in shares) 9,042 [30] 9,042 [31]
Cost $ 17,692 [30] $ 17,692 [31]
Fair value $ 59,370 [30] $ 50,890 [31]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 1    
Schedule of Investments [Line Items]    
Reference Rate and Spread 8.50% [11],[14],[32] 8.50% [26],[27],[28]
Principal $ 0 [11],[14],[32] $ 0 [26],[27],[28]
Cost 0 [11],[14],[32] 0 [26],[27],[28]
Fair value $ 0 [11],[14],[32] $ 0 [26],[27],[28]
Investment, Identifier [Axis]: Gamber-Johnson Holdings, LLC, Secured Debt 2    
Schedule of Investments [Line Items]    
Total Rate 11.50% [11],[14],[55] 11.50% [26],[27]
Reference Rate and Spread 8.50% [11],[14],[55] 8.50% [26],[27]
Principal $ 63,278 [11],[14],[55] $ 64,078 [26],[27]</