Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plans - Additional information (Details)

v3.23.2
Equity Incentive Plans - Additional information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Jun. 28, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock-based compensation $ 3,300,000 $ 3,700,000          
Employee benefits and share-based compensation 3,325,000 3,661,000 $ 6,511,000 $ 8,085,000      
Unrecognized compensation costs $ 24,600,000 $ 19,100,000 $ 24,600,000 $ 19,100,000      
Total unrecognized compensation costs expected to be recognized, Period     2 years 10 months 24 days 2 years      
Performance Award shares vested [1]     414,634 463,408      
Distribution equivalent units     1,306,880 610,541      
Unvested Performance Awards 1,844,519 1,167,873 1,844,519 1,167,873 958,985 1,037,848  
Employee Stock Option              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock-based compensation     $ 46,000 $ 30,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Granted     67,000 83,000      
Service vesting awards granted     $ 67,000 83,000      
Service-Vesting Awards              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Service vesting awards     2 years        
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Granted     $ 18,100,000 10,700,000      
Service vesting awards granted     $ 18,100,000 $ 10,700,000      
Performance Vesting Awards              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Service vesting awards     The total compensation will be determined by the Company’s TSR relative to specified BDCs during a specified performance period. Depending on the results achieved during the specified performance period, the actual number of shares that a grant recipient receives at the end of the period may range from 0% to 200% of the target shares granted.        
Performance Award shares vested     0        
Unvested Performance Awards 0 0 0 0      
Performance Deu Member              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Performance Award shares vested     54,858 241,770      
Distribution equivalent units (“DEUs”) were issued with a grant date fair value     $ 700,000 $ 4,000,000      
Performance Vesting Award Member              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Performance Award shares vested       487,409      
Liability Classified Awards              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Stock-based compensation     700,000 $ 2,300,000      
Unrecognized compensation costs $ 1,200,000 $ 3,200,000 $ 1,200,000 $ 3,200,000      
Total unrecognized compensation costs expected to be recognized, Period     9 months 18 days 1 year 9 months 18 days      
Remaining max award value $ 3,100,000   $ 3,100,000        
Weighted average performance conditions in liability 100.00%   100.00%        
Accounts payable and accrued liabilities $ 1,900,000 $ 2,000,000 $ 1,900,000 $ 2,000,000      
Liability award vested     $ 0 $ 6,000,000      
Two Thousand Eighteen Plan And Director Plan              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Common stock, shares authorized             18,700,000
Two Thousand Eighteen Plan And Director Plan | Restricted Stock              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Common stock, shares authorized             300,000
2018 Plan | Restricted Stock              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Common stock, shares authorized             9,261,229
Director Plan | Restricted Stock              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Common stock, shares authorized             300,000
[1] With respect to certain restricted stock equity awards granted prior to January 1, 2019, receipt of the shares of the Company’s common stock underlying vested restricted stock equity awards will be deferred for four years from grant date unless certain conditions are met. Accordingly, such vested restricted stock equity awards will not be issued as common stock upon vesting until the completion of the deferral period.