Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plans - Additional information (Details)

v3.22.4
Equity Incentive Plans - Additional information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jun. 28, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unvested Shares Beginning of Period 958,985 1,037,848 989,100 782,346  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period 632,831 751,074 779,211    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period [1] 686,030 620,116 543,486    
Common stock, shares authorized 200,000,000.0 200,000,000.0      
Stock-based compensation $ 13,400,000 $ 11,900,000 $ 11,100,000    
Accounts payable and accrued liabilities $ 47,539,000 $ 47,781,000      
Total unrecognized compensation costs expected to be recognized, Period 1 year 8 months 12 days 1 year 9 months 18 days      
unrecognized compensation costs $ 13,100,000 $ 15,800,000      
Share-Based Payment Arrangement, Option [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Stock-based compensation 76,000 37,000 28,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Granted $ 166,000 144,000 10,000    
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 $ 11,100,000 12,100,000 $ 11,200,000    
Liability Classified Awards [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested 7,200,000        
Stock-based compensation $ 2,700,000 $ 1,700,000      
Weighted average performance conditions in liability 100.00%        
Total unrecognized compensation costs expected to be recognized, Period 1 year 3 months 18 days 2 years 2 months 12 days      
unrecognized compensation costs $ 1,900,000 $ 4,500,000      
Remaining Max Award Value 3,100,000        
Accounts payable and accrued liabilities 1,200,000 $ 5,700,000      
Liability award vested $ 7,200,000        
Performance Vesting Award [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Unvested Shares Beginning of Period 0 487,409 487,409    
Share Based Compensation Arrangement By Share Based Payment Award Distribution Equivalent Unit Grant Date Fair Value $ 8,100,000        
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period 487,409        
Distribution equivalent units (“DEUs”) were issued with a grant date fair value $ 8,100,000        
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 DEU [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share Based Compensation Arrangement By Share Based Payment Award Distribution Equivalent Unit Grant Date Fair Value $ 6,200,000        
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period 639,413        
Distribution equivalent units (“DEUs”) were issued with a grant date fair value $ 6,200,000        
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
Additional Grant [Member] | Performance Vesting Award [Member]          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period 487,409        
[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.