Agreements and Related Party Transactions (Details) $ in Thousands			12 Months Ended			51 Months Ended
	May 08, 2023 component	May 18, 2021	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Management fees			$ 191,622	$ 188,755	$ 178,472
Performance based incentive fees			159,857	118,091	103,968
Affiliated entity | Administration Agreement
Related Party Transaction [Line Items]
Contract term		2 years
Written notice for contract termination, term	60 days
Affiliated entity | Administration Agreement, Costs And Expenses Reimbursable
Related Party Transaction [Line Items]
Amount of transaction			8,100	6,400	5,800
Affiliated entity | Investment Advisory Agreement
Related Party Transaction [Line Items]
Contract term		2 years
Written notice for contract termination, term	60 days
Required term of written notice for contract termination for certain circumstances	120 days
Incentive fee components | component	2
Affiliated entity | Investment Advisory Agreement, Management Fee - Average Gross Assets
Related Party Transaction [Line Items]
Base rate	1.50%
Affiliated entity | Investment Advisory Agreement, Management Fee - Asset Coverage Ratio Threshold
Related Party Transaction [Line Items]
Base rate	200.00%
Affiliated entity | Investment Advisory Agreement, Management Fee - Average Gross Assets Below Asset Coverage Ratio
Related Party Transaction [Line Items]
Base rate	1.00%
Affiliated entity | Investment Management Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income
Related Party Transaction [Line Items]
Incentive rate	100.00%
Affiliated entity | Investment Management Agreement - Incentive Rate, Quarterly Hurdle Rate
Related Party Transaction [Line Items]
Incentive rate	1.50%
Affiliated entity | Investment Advisory Agreement - Incentive Rate, Pre-Incentive Fee Net Investment Income Threshold
Related Party Transaction [Line Items]
Incentive rate	17.50%
Affiliated entity | Investment Advisory Agreement - Incentive Rate, Quarterly Threshold
Related Party Transaction [Line Items]
Incentive rate	1.82%
Affiliated entity | Investment Management Agreement - Incentive Rate, Realized Capital Gains
Related Party Transaction [Line Items]
Incentive rate	17.50%
Affiliated entity | Management Fee
Related Party Transaction [Line Items]
Management fees			191,600	188,800	178,500
Affiliated entity | Performance Based Incentive Fee
Related Party Transaction [Line Items]
Performance based incentive fees			159,900	$ 118,100	$ 104,000
Affiliated entity | Commitment To Indirectly Owned Subsidiary
Related Party Transaction [Line Items]
Amount of transaction						$ 450,000
Affiliated entity | Commitment To Amergin AssetCo
Related Party Transaction [Line Items]
Amount of transaction			147,600
Affiliated entity | Equity Commitment To Amergin AssetCo
Related Party Transaction [Line Items]
Amount of transaction			62,400
Affiliated entity | Debt Commitment To Amergin AssetCo
Related Party Transaction [Line Items]
Amount of transaction			85,200
Affiliated entity | Equity Commitment To Fifth Season
Related Party Transaction [Line Items]
Amount of transaction			156,800
Affiliated entity | Equity Commitment To LSI Financing
Related Party Transaction [Line Items]
Amount of transaction			$ 19,000