Agreements and Related Party Transactions (Details)			12 Months Ended			63 Months Ended
	May 06, 2024 component	May 18, 2021	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($)
Related Party Transaction [Line Items]
Management fees			$ 193,570,000	$ 191,622,000	$ 188,755,000
Incentive fees			157,193,000	159,857,000	118,091,000
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			9,000,000	8,100,000	6,400,000
Affiliated entity | Investment Advisory Agreement
Related Party Transaction [Line Items]
Contract term		2 years
Written notice for contract termination, term	60 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 | Management Fee
Related Party Transaction [Line Items]
Management fees			193,600,000	191,600,000	188,800,000
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 | Performance Based Incentive Fee
Related Party Transaction [Line Items]
Incentive fees			157,200,000	159,900,000	118,100,000
Affiliated entity | Capital Gains Based Incentive Fees
Related Party Transaction [Line Items]
Incentive fees			0	$ 0	$ 0
Affiliated entity | Commitment To Indirectly Owned Subsidiary
Related Party Transaction [Line Items]
Amount of transaction						$ 500,000,000
Affiliated entity | Commitment To Amergin AssetCo
Related Party Transaction [Line Items]
Amount of transaction			229,600,000
Affiliated entity | Equity Commitment To Amergin AssetCo
Related Party Transaction [Line Items]
Amount of transaction			138,900,000
Affiliated entity | Debt Commitment To Amergin AssetCo
Related Party Transaction [Line Items]
Amount of transaction			90,700,000
Affiliated entity | Equity And Debt Commitment | Amergin Asset Management, LLC
Related Party Transaction [Line Items]
Amount of transaction			800,000
Affiliated entity | Equity Commitment To Fifth Season
Related Party Transaction [Line Items]
Amount of transaction			223,300,000
Affiliated entity | Equity Commitment To LSI Financing DAC
Related Party Transaction [Line Items]
Amount of transaction			4,800,000
Affiliated entity | Commitment To LSI Financing DAC
Related Party Transaction [Line Items]
Amount of transaction			4,700,000
Affiliated entity | Equity Commitment To LSI Financing LLC
Related Party Transaction [Line Items]
Amount of transaction			158,800,000
Affiliated entity | Commitment To LSI Financing LLC
Related Party Transaction [Line Items]
Amount of transaction			$ 159,200,000