Investments - Changes in Investments Categorized as Level 3 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Changes in investments categorized as Level 3
Beginning balance	$ 158,036	$ 117,115	$ 152,409	$ 35,991
Net realized and unrealized gains (losses)	$ 507	$ (4,593)	$ 2,217	$ (4,991)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax
Acquisitions (1)	$ 50,781	$ 23,731	$ 131,814	$ 105,958
Dispositions (2)	(14,149)	(689)	(78,705)	(1,394)
Transfers in (out) of Level 3		5,842	(12,560)	5,842
Ending Balance	195,175	141,406	195,175	141,406
Net change in unrealized appreciation/(depreciation) during the period on investments still held at period end (included in net realized and unrealized gains/(losses) above)	$ 594	$ (4,433)	$ 2,630	$ (4,837)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax	Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, after Tax
Transfers of assets from level 1 to 2	$ 0	$ 0	$ 0	$ 0
Transfers of assets from level 2 to 1	0	0	0	0
First Lien Secured Debt
Changes in investments categorized as Level 3
Beginning balance	122,072	88,970	118,248	8,420
Net realized and unrealized gains (losses)	376	685	513	575
Acquisitions (1)	50,336	22,994	130,739	103,859
Dispositions (2)	(13,984)	(219)	(78,140)	(424)
Transfers in (out) of Level 3			(12,560)
Reclassifications	(27)		(27)
Ending Balance	158,773	112,430	158,773	112,430
Net change in unrealized appreciation/(depreciation) during the period on investments still held at period end (included in net realized and unrealized gains/(losses) above)	426	681	889	566
Second lien secured debt
Changes in investments categorized as Level 3
Beginning balance	2,215		2,012
Net realized and unrealized gains (losses)	12		38
Acquisitions (1)	77		254
Ending Balance	2,304		2,304
Net change in unrealized appreciation/(depreciation) during the period on investments still held at period end (included in net realized and unrealized gains/(losses) above)	12		38
Corporate Bond
Changes in investments categorized as Level 3
Beginning balance	28,214	27,603	28,147	27,605
Net realized and unrealized gains (losses)	(182)	(5,311)	(416)	(5,603)
Acquisitions (1)	242	237	543	527
Dispositions (2)	(90)	(9)	(90)	(9)
Transfers in (out) of Level 3		5,842		5,842
Ending Balance	28,184	28,362	28,184	28,362
Net change in unrealized appreciation/(depreciation) during the period on investments still held at period end (included in net realized and unrealized gains/(losses) above)	(183)	(5,147)	(418)	(5,440)
Revolver
Changes in investments categorized as Level 3
Beginning balance	346	542	584	(34)
Net realized and unrealized gains (losses)	(38)	33	(28)	37
Acquisitions (1)	126	489	278	1,561
Dispositions (2)	(75)	(461)	(475)	(961)
Reclassifications	27		27
Ending Balance	386	603	386	603
Net change in unrealized appreciation/(depreciation) during the period on investments still held at period end (included in net realized and unrealized gains/(losses) above)	(1)	33	10	37
Equity - Preferred Equity
Changes in investments categorized as Level 3
Beginning balance	3,151		3,151
Acquisitions (1)		11		11
Ending Balance	3,151	$ 11	3,151	$ 11
Equity - Common Stock
Changes in investments categorized as Level 3
Beginning balance	2,038		267
Net realized and unrealized gains (losses)	339		2,110
Ending Balance	2,377		2,377
Net change in unrealized appreciation/(depreciation) during the period on investments still held at period end (included in net realized and unrealized gains/(losses) above)	$ 340		$ 2,111