Debt - Additional Information (Details) $ / shares in Units, € in Millions, £ in Millions, $ in Millions, $ in Millions					1 Months Ended		3 Months Ended				9 Months Ended			12 Months Ended
	Aug. 01, 2022 USD ($) $ / shares shares	Jan. 26, 2022 USD ($) $ / shares	Feb. 03, 2021 USD ($)	Feb. 05, 2020 USD ($)	Nov. 30, 2019 USD ($)	Jan. 31, 2018 USD ($)	Sep. 30, 2022 USD ($)		Dec. 31, 2021 USD ($) shares	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)		Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2022 AUD ($)	Sep. 30, 2022 GBP (£)	Sep. 30, 2022 CAD ($)	Sep. 30, 2022 EUR (€)	Jun. 30, 2022 USD ($)	Apr. 25, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2018 USD ($)	Feb. 28, 2017 USD ($)
Debt Instrument [Line Items]
Asset coverage percentage							186.60%		205.40%		186.60%			205.40%		186.60%	186.60%	186.60%	186.60%
Aggregate principal amount							$ 2,382,500,000		$ 2,407,490,000		$ 2,382,500,000			$ 2,407,490,000
Line of credit facility, remaining borrowing capacity							845,669,000	[1]	1,193,558,000		845,669,000	[1]		1,193,558,000
Stockholders' equity							1,328,052,000		1,275,848,000	$ 1,251,845,000	1,328,052,000		$ 1,251,845,000	1,275,848,000	$ 1,161,315,000					$ 1,241,959,000		$ 1,283,985,000	$ 1,223,813,000	$ 1,185,332,000
Notional amount of interest rate swap							802,500,000		1,060,950,000		$ 802,500,000			1,060,950,000
2022 Convertible Notes
Debt Instrument [Line Items]
Aggregate principal amount	$ 79,200,000								$ 99,990,000					$ 99,990,000	29,700,000											$ 115,000,000.0
Debt instrument, interest rate									4.50%					4.50%												4.50%
Additional aggregate principal amount																									$ 57,500,000
Debt instrument, maturity date											Aug. 01, 2022
Debt instrument, conversion price | $ / shares	$ 17.92	$ 20.00
Extinguishment of debt, amount															29,500,000
Aggregate principal amount of notes surrendered for conversion										42,800,000			42,800,000
Debt instrument, principal converted amount	$ 78,100,000								$ 42,800,000
Debt conversion, shares Issued | shares	4,360,125								2,324,820
Debt conversion principal amount		$ 1,000,000
Proceeds from settlements of interest rate swaps excluding upfront fees							900,000				$ 5,800,000
Payments for settlements of interest rate swaps excluding upfront fees							900,000				$ 4,900,000
Proceeds from settlements of interest rate swaps related to convertible notes										2,100,000			6,300,000
Payments for settlements of interest rate swaps related to convertible notes										1,300,000			4,000,000.0
2022 Convertible Notes | LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis											three month LIBOR
Debt Instrument, basis spread on variable rate											2.11%
2023 Notes
Debt Instrument [Line Items]
Aggregate principal amount						$ 150,000,000.0	$ 150,000,000		$ 150,000,000		$ 150,000,000			$ 150,000,000
Debt instrument, interest rate						4.50%	4.50%		4.50%		4.50%			4.50%		4.50%	4.50%	4.50%	4.50%
Debt instrument, maturity date						Jan. 22, 2023
Derivative maturity date						Jan. 22, 2023
Proceeds from issuance of debt, net of underwriting discount and offering costs						$ 146,900,000
Notional amount of interest rate swap						$ 150,000,000.0
2023 Notes | LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis											three-month LIBOR
Debt Instrument, basis spread on variable rate						1.99%					1.99%			1.99%
2024 Notes
Debt Instrument [Line Items]
Aggregate principal amount				$ 50,000,000.0	$ 300,000,000.0		$ 347,500,000		$ 347,500,000		$ 347,500,000			$ 347,500,000	2,400,000
Debt instrument, interest rate					3.875%		3.875%		3.875%		3.875%			3.875%		3.875%	3.875%	3.875%	3.875%
Debt instrument, maturity date				Nov. 01, 2024	Nov. 01, 2024
Derivative maturity date				Nov. 01, 2024
Extinguishment of debt, amount															$ 2,500,000
Proceeds from issuance of debt, net of underwriting discount and offering costs				$ 50,100,000	$ 292,900,000
Notional amount of interest rate swap				$ 50,000,000.0	$ 300,000,000.0
Gain (loss) on fair value effective hedge											$ (19,900,000)			$ 4,400,000
2024 Notes | LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis											three-month LIBOR
Debt Instrument, basis spread on variable rate				2.28%							2.28%			2.28%
2026 Notes
Debt Instrument [Line Items]
Aggregate principal amount			$ 300,000,000.0				$ 300,000,000		$ 300,000,000		$ 300,000,000			$ 300,000,000
Debt instrument, interest rate			2.50%				2.50%		2.50%		2.50%			2.50%		2.50%	2.50%	2.50%	2.50%
Debt instrument, maturity date			Aug. 01, 2026
Derivative maturity date			Aug. 01, 2026
Proceeds from issuance of debt, net of underwriting discount and offering costs			$ 293,700,000
Notional amount of interest rate swap			$ 300,000,000.0
Gain (loss) on fair value effective hedge											$ (38,400,000)			$ (10,200,000)
2026 Notes | LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis											three-month LIBOR
Debt Instrument, basis spread on variable rate			1.91%								1.91%			1.91%
2023 Notes, 2024 Notes and 2026 Notes
Debt Instrument [Line Items]
Proceeds from settlements of interest rate swaps excluding upfront fees							$ 7,000,000.0			7,000,000.0	$ 20,900,000		20,200,000
Payments for settlements of interest rate swaps excluding upfront fees							8,700,000			$ 4,700,000	$ 19,600,000		$ 13,200,000
2023 Notes, 2024 Notes and 2026 Notes | LIBOR
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis											three month LIBOR
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity																					$ 1,585,000,000	$ 1,510,000,000
Aggregate principal amount							1,585,000,000		$ 1,510,000,000		$ 1,585,000,000			$ 1,510,000,000
Line of credit facility, remaining borrowing capacity							845,669,000	[1]	1,193,558,000		$ 845,669,000	[1]		1,193,558,000
Line of credit, outstanding amount																$ 59.0	£ 7.9	$ 111.5	€ 13.6
Issuance of letters of credit									$ 0					$ 0
Line of credit facility, undrawn amount percentage											0.375%
Percentage of net proceeds of sale of equity interests											25.00%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity																					$ 2,000,000,000.0
Issuance of letters of credit							$ 100,000				$ 100,000
Interest amount											1.875%
Asset coverage ratio							1.5				1.5					1.5	1.5	1.5	1.5
Revolving Credit Facility | Maximum | Base Rate
Debt Instrument [Line Items]
Line of credit facility, base rate percentage							0.875%				0.875%					0.875%	0.875%	0.875%	0.875%
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Interest amount											1.75%
Stockholders' equity							$ 500,000,000				$ 500,000,000
Revolving Credit Facility | Minimum | Obligor Group
Debt Instrument [Line Items]
Asset coverage ratio							2				2					2	2	2	2
Revolving Credit Facility | Minimum | Base Rate
Debt Instrument [Line Items]
Line of credit facility, base rate percentage							0.75%				0.75%					0.75%	0.75%	0.75%	0.75%
Revolving Credit Facility Maturity on April 23, 2027
Debt Instrument [Line Items]
Line of credit facility, extended date											Apr. 24, 2026
Line of credit facility, stated maturity date											Apr. 23, 2027
Line of credit facility, remaining borrowing capacity							$ 75,000,000.0				$ 75,000,000.0
Revolving Credit Facility Maturity on January 31, 2025
Debt Instrument [Line Items]
Line of credit facility, stated maturity date											Jan. 31, 2025
Line of credit facility, remaining borrowing capacity							25,000,000.0				$ 25,000,000.0
Line of credit facility, expiration date											Jan. 31, 2024
Revolving Credit Facility Maturity on February 4, 2026
Debt Instrument [Line Items]
Line of credit facility, stated maturity date											Feb. 04, 2026
Line of credit facility, remaining borrowing capacity							50,000,000.0				$ 50,000,000.0
Line of credit facility, expiration date											Feb. 04, 2025
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity							$ 75,000,000.0				$ 75,000,000.0

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