Debt - Schedule of Debt Obligations (Details) - USD ($) $ in Thousands		Sep. 30, 2023		Aug. 14, 2023	Dec. 31, 2022		Feb. 03, 2021	Dec. 31, 2020	Feb. 05, 2020	Nov. 30, 2019	Jan. 31, 2018
Debt Instrument [Line Items]
Aggregate Principal Amount Committed		$ 2,657,500			$ 2,382,500
Outstanding Principal		1,705,747			1,516,828
Amount Available		951,572	[1]		865,672	[2]
Carrying Value		1,623,010	[3],[4]		1,441,796	[5],[6]
Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate Principal Amount Committed		1,710,000			1,585,000
Outstanding Principal		758,247			719,328
Amount Available		951,572	[1]		865,672	[2]
Carrying Value		742,237	[3],[4]		706,156	[5],[6]
2023 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed					150,000						$ 150,000
Outstanding Principal					150,000
Carrying Value	[5],[6]				149,960
2024 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed		347,500			347,500			$ 2,400	$ 50,000	$ 300,000
Outstanding Principal		347,500			347,500
Carrying Value		330,817	[3],[4]		325,492	[5],[6]
2026 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed		300,000			300,000		$ 300,000
Outstanding Principal		300,000			300,000
Carrying Value		261,984	[3],[4]		$ 260,188	[5],[6]
2028 Notes
Debt Instrument [Line Items]
Aggregate Principal Amount Committed		300,000		$ 300,000
Outstanding Principal		300,000
Carrying Value	[3],[4]	$ 287,972

[1] The amount available may be subject to limitations related to the borrowing base under the Revolving Credit Facility and asset coverage requirements.

[2] The amount available may be subject to limitations related to the borrowing base under the Revolving Credit Facility and asset coverage requirements.

[3] The carrying values of the 2024 Notes, 2026 Notes and 2028 Notes are presented inclusive of an incremental $(15.1) million, $(34.7) million and $(6.1) million, respectively, which represents an adjustment in the carrying values of the 2024 Notes, 2026 Notes and 2028 Notes, each resulting from a hedge accounting relationship.

[4] The carrying values of the Revolving Credit Facility, 2024 Notes, 2026 Notes and 2028 Notes are presented net of the combination of deferred financing costs and original issue discounts totaling $16.0 million, $1.5 million, $3.3 million and $5.9 million, respectively.

[5] The carrying values of the 2024 Notes and 2026 Notes are presented inclusive of an incremental $(19.4) million and $(35.7) million, respectively, which represents an adjustment in the carrying values of the 2024 Notes and 2026 Notes, each resulting from a hedge accounting relationship.

[6] The carrying values of the Revolving Credit Facility, 2023 Notes, 2024 Notes and 2026 Notes are presented net of the combination of deferred financing costs and original issue discounts totaling $13.2 million, less than $0.1 million, $2.6 million and $4.1 million, respectively.