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v3.23.3

Fair Value of Financial Instruments - Changes in Level 3 Portfolio Investments Rollforward (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, after Tax | Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, after Tax | Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, after Tax | Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, after Tax
Total |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | $ 1,660,246 | $ 1,760,395 | $ 1,716,054 | $ 1,632,922
Investments purchased | 146,798 | 193,554 | 335,040 | 516,295
Accretion of discount | 3,899 | 4,191 | 10,842 | 9,165
Sales and principal repayments | (127,928) | (200,034) | (328,159) | (370,619)
Ending balance | 1,701,036 | 1,759,742 | 1,701,036 | 1,759,742
Change in net unrealized appreciation (depreciation) on investments | 5,013 | (8,075) | (13,507) | (39,778)
Total | Debt and Equity Securities, Realized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | (8,123) | (17,166) | (31,576) | (17,055)
Total | Debt and Equity Securities, Unrealized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | 26,144 | 18,802 | (1,165) | (10,966)
Senior Secured First Lien Debt |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 1,468,630 | 1,660,828 | 1,579,512 | 1,526,989
Investments purchased | 112,470 | 142,620 | 231,183 | 460,119
Accretion of discount | 3,847 | 4,170 | 10,657 | 8,705
Sales and principal repayments | (127,838) | (199,103) | (327,883) | (353,141)
Ending balance | 1,481,498 | 1,616,352 | 1,481,498 | 1,616,352
Change in net unrealized appreciation (depreciation) on investments | 10,453 | (7,793) | 1,685 | (43,281)
Senior Secured First Lien Debt | Debt and Equity Securities, Realized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | (5,844) | 10,452 | (23,518) | 10,345
Senior Secured First Lien Debt | Debt and Equity Securities, Unrealized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | 30,233 | (2,615) | 11,547 | (36,665)
Senior Secured Second Lien Debt |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 39,544 | 27,086 | 38,769 | 38,583
Investments purchased | 0 | 18,109 | 0 | 19,945
Accretion of discount | 47 | 17 | 172 | 449
Sales and principal repayments | (4) | (536) | (13) | (15,536)
Ending balance | 36,114 | 38,716 | 36,114 | 38,716
Change in net unrealized appreciation (depreciation) on investments | (3,473) | (3) | (2,814) | 798
Senior Secured Second Lien Debt | Debt and Equity Securities, Realized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | 0 | (19,339) | 0 | (19,325)
Senior Secured Second Lien Debt | Debt and Equity Securities, Unrealized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | (3,473) | 13,379 | (2,814) | 14,600
Collateralized securities and structured products - equity |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 1,046 | 1,602 | 1,179 | 2,998
Investments purchased | 0 | 0 | 0 | 0
Accretion of discount | 0 | 0 | 0 | 0
Sales and principal repayments | (86) | (132) | (263) | (1,176)
Ending balance | 1,224 | 1,366 | 1,224 | 1,366
Change in net unrealized appreciation (depreciation) on investments | 264 | (128) | 308 | (480)
Collateralized securities and structured products - equity | Debt and Equity Securities, Realized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | 0 | 24 | 0 | 24
Collateralized securities and structured products - equity | Debt and Equity Securities, Unrealized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | 264 | (128) | 308 | (480)
Unsecured debt |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 17,301 | 27,994 | 22,643 | 26,616
Investments purchased | 0 | 677 | 4,200 | 1,950
Accretion of discount | 5 | 4 | 13 | 11
Sales and principal repayments | 0 | 0 | 0 | 0
Ending balance | 14,631 | 28,319 | 14,631 | 28,319
Change in net unrealized appreciation (depreciation) on investments | (2,675) | (356) | (12,225) | (257)
Unsecured debt | Debt and Equity Securities, Realized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | 0 | 0 | 0 | 0
Unsecured debt | Debt and Equity Securities, Unrealized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | (2,675) | (356) | (12,225) | (258)
Equity |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 133,725 | 42,885 | 73,951 | 37,736
Investments purchased | 34,328 | 32,148 | 99,657 | 34,281
Accretion of discount | 0 | 0 | 0 | 0
Sales and principal repayments | 0 | (263) | 0 | (766)
Ending balance | 167,569 | 74,989 | 167,569 | 74,989
Change in net unrealized appreciation (depreciation) on investments | 444 | 205 | (461) | 3,442
Equity | Debt and Equity Securities, Realized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | (2,279) | (8,303) | (8,058) | (8,099)
Equity | Debt and Equity Securities, Unrealized Gain (Loss) |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Total gains or losses included in earnings | $ 1,795 | $ 8,522 | $ 2,019 | $ 11,837

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