Quarterly report pursuant to Section 13 or 15(d)

SHARE-BASED COMPENSATION - Narrative (Details)

v3.23.1
SHARE-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Share‑based compensation $ 4,100 $ 2,818
Share-based payment arrangement, nonvested award, vested fair value $ 1,400  
Restricted Stock    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Vesting period 3 years  
Share‑based compensation $ (4,100) $ 2,800
Share-based payment arrangement, nonvested award, excluding option, cost not yet recognized, amount $ 21,600  
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition 2 years 2 months 12 days  
Restricted Stock | Main Street Capital Corporation 2022 Equity and Incentive Plan    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Vesting period 3 years