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Equity Incentive Plans - Additional information (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 28, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation | $ 13,200,000 | $ 13,400,000 | $ 11,900,000 |  |
unrecognized compensation costs | $ 21,700,000 | $ 13,100,000 |  |  |
Total unrecognized compensation costs expected to be recognized, Period | 3 years 6 months | 1 year 8 months 12 days |  |  |
Vested (in shares) | 632,575 | 686,030 | 620,116 |  |
Unvested Performance Awards (in shares) | 1,880,409 | 958,985 | 1,037,848 | 989,100 |
Granted (in shares) | 1,565,571 | 632,831 | 751,074 |  |
Minimum |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting percentages | 0.00% |  |  |  |
Maximum |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting percentages | 200.00% |  |  |  |
Service-Vesting Awards |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting awards granted | $ 22,200,000 | $ 11,100,000 | $ 12,100,000 |  |
Service-Vesting Awards | Share-Based Payment Arrangement, Tranche One |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting percentages | 33.33% |  |  |  |
Service-Vesting Awards | Share-Based Payment Arrangement, Tranches Two And Three |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting awards | 2 years |  |  |  |
Service-Vesting Awards | Share-Based Payment Arrangement, Tranche Two |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting percentages | 33.33% |  |  |  |
Service-Vesting Awards | Share-Based Payment Arrangement, Tranche Three |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Service vesting percentages | 33.33% |  |  |  |
Service-Vesting Awards | Maximum |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period | 7 years |  |  |  |
Employee Stock Option Member |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation | $ 105,000 | 76,000 | 37,000 |  |
Service vesting awards granted | $ 148,000 | $ 166,000 | $ 144,000 |  |
Performance Vesting Award |  |  |  |  |
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. |  |  |  |
Vesting period | 4 years |  |  |  |
Vested (in shares) | 0 | 487,409 |  |  |
Distribution equivalent units (“DEUs”) were issued with a grant date fair value |  | $ 6,200,000 |  |  |
Unvested Performance Awards (in shares) | 0 | 0 | 487,409 |  |
Performance Vesting Award | Minimum |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Disposal period after vesting | 1 year |  |  |  |
Performance DEU |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vested (in shares) |  | 639,413 | 0 |  |
Distribution equivalent units (“DEUs”) were issued with a grant date fair value | $ 700,000 |  |  |  |
Granted (in shares) | 54,858 |  |  |  |
Liability Classified Awards |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation | $ 1,400,000 | $ 2,700,000 |  |  |
unrecognized compensation costs | $ 500,000 | $ 1,900,000 |  |  |
Total unrecognized compensation costs expected to be recognized, Period | 3 months 18 days | 1 year 3 months 18 days |  |  |
Vesting period | 4 years |  |  |  |
Remaining max award value | $ 3,100,000 |  |  |  |
Weighted average performance conditions in liability | 100.00% |  |  |  |
Accounts payable and accrued liabilities | $ 2,600,000 | $ 1,200,000 |  |  |
Liability award vested | $ 0 | $ 7,200,000 |  |  |
Other Liability Classified Awards |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
2018 Plan | Common Stock |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Common stock authorized (in shares) | 18,700,000 |  |  |  | 9,261,229
Director Plan | Common Stock |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Common stock authorized (in shares) | 300,000 |  |  |  | 300,000

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