Debt and Foreign Currency Transactions and Translations - Schedule of Outstanding Debt Obligations (Details) - USD ($)					12 Months Ended
		Dec. 13, 2023	Jul. 16, 2021	Mar. 03, 2015	Dec. 31, 2023		Dec. 31, 2022
Debt Instrument [Line Items]
Debt Instrument, Face Amount					$ 2,492,000,000		$ 2,238,829,000
Principal Amount Outstanding					1,469,977,000		1,487,503,000
Deferred Financing Costs and Debt Discount					7,710,000		(4,109,000)
Total Debt Obligations, net of Deferred Financing Cost and Debt Discount					1,462,267,000		1,483,394,000
Fair Value of Debt Obligations					$ 1,446,881,000		$ 1,455,759,000
Senior Secured Facility
Debt Instrument [Line Items]
Date Issued/ Amended					Apr. 19, 2023		Dec. 22, 2020
Debt Instrument, Face Amount					$ 1,705,000,000		$ 1,763,829,000
Principal Amount Outstanding					682,977,000		1,012,503,000
Fair Value of Debt Obligations					$ 682,977,000		$ 1,012,503,000
Final Maturity Date					Apr. 19, 2028	[1]	Dec. 22, 2025	[2]
Bethesda CLO 1 Class A-1
Debt Instrument [Line Items]
Date Issued/ Amended					Nov. 02, 2023
Debt Instrument, Face Amount					$ 232,000,000
Principal Amount Outstanding					232,000,000
Fair Value of Debt Obligations					$ 232,000,000
Final Maturity Date	[3]				Oct. 23, 2035
2025 Notes
Debt Instrument [Line Items]
Date Issued/ Amended					Mar. 03, 2015		Mar. 03, 2015
Debt Instrument, Face Amount				$ 350,000,000	$ 350,000,000		$ 350,000,000
Principal Amount Outstanding					350,000,000		350,000,000
Fair Value of Debt Obligations					$ 336,013,000		$ 333,002,000
Final Maturity Date				Mar. 03, 2025	Mar. 03, 2025	[3]	Mar. 03, 2025	[4]
2026 Notes
Debt Instrument [Line Items]
Date Issued/ Amended					Jul. 16, 2021		Jul. 16, 2021
Debt Instrument, Face Amount			$ 125,000,000		$ 125,000,000		$ 125,000,000
Principal Amount Outstanding					125,000,000		125,000,000
Fair Value of Debt Obligations					$ 114,291,000		$ 110,254,000
Final Maturity Date			Jul. 16, 2026		Jul. 16, 2026	[3]	Jul. 16, 2026	[4]
2028 Notes
Debt Instrument [Line Items]
Date Issued/ Amended					Dec. 13, 2023
Debt Instrument, Face Amount		$ 80,000,000			$ 80,000,000
Principal Amount Outstanding					80,000,000
Fair Value of Debt Obligations					$ 81,600,000
Final Maturity Date		Dec. 15, 2028			Dec. 15, 2028	[5]

[1] The fair value of these debt obligations would be categorized as Level 3 under ASC 820 as of December 31, 2023. The valuation is based on a yield analysis and discount rate commensurate with the market yields for similar types of debt.

[2] The fair value of these debt obligations would be categorized as Level 3 under ASC 820 as of December 31, 2022. The valuation is based on a yield analysis and discount rate commensurate with the market yields for similar types of debt.

[3] The fair value of these debt obligations would be categorized as Level 2 under ASC 820 as of December 31, 2023. The valuation is based on broker quoted prices.

[4] The fair value of these debt obligations would be categorized as Level 2 under ASC 820 as of December 31, 2022. The valuation is based on broker quoted prices.

[5] The fair value of these debt obligations would be categorized as Level 1 under ASC 820 as of December 31, 2023. The valuation is arrived using the closing price on exchange as on the relevant date.