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Debt Obligations, net (Schedule of Debt) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended			6 Months Ended
		Jun. 30, 2018	Jun. 30, 2022		Jun. 30, 2021	Jun. 30, 2022		Jun. 30, 2021	Apr. 30, 2022	Mar. 31, 2022	Dec. 31, 2021		Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt obligations			$ 1,857,957			$ 1,857,957
Debt discounts and deferred financing costs, net			(24,707)			(24,707)					$ (32,201)
Total debt obligations, net	[1]		1,833,250			1,833,250					2,572,174
Stockholders' equity			1,630,864	[1]	$ 1,008,706	1,630,864	[1]	$ 1,008,706		$ 1,784,950	1,063,206	[1]	$ 1,051,007	$ 1,064,383
Interest costs capitalized			$ 400		$ 200	$ 700		$ 400
Period of Adoption, Adjustment
Debt Instrument [Line Items]
Stockholders' equity														$ (10,019)
Senior Term Loan | LIBOR
Debt Instrument [Line Items]
Basis point spread on variable interest rate						1.00%
3.125% Senior Convertible Notes
Debt Instrument [Line Items]
Stated interest rate			3.125%		3.125%	3.125%		3.125%
Secured Debt
Debt Instrument [Line Items]
Total debt obligations			$ 0			$ 0					491,875
Debt discounts and deferred financing costs, net			0			0
Total debt obligations, net			0			0
Secured Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Total debt obligations			0			$ 0					0
Debt instrument term						1 year
Secured Debt | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis point spread on variable interest rate						2.00%
Secured Debt | Revolving Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Basis point spread on variable interest rate						1.00%
Secured Debt | Revolving Credit Facility | LIBOR | Minimum | Interest Rate Category Two
Debt Instrument [Line Items]
Basis point spread on variable interest rate						2.00%
Secured Debt | Revolving Credit Facility | LIBOR | Maximum | Interest Rate Category Two
Debt Instrument [Line Items]
Basis point spread on variable interest rate						2.50%
Secured Debt | Revolving Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Basis point spread on variable interest rate						0.50%
Secured Debt | Revolving Credit Facility | Base Rate | Minimum | Interest Rate Category One
Debt Instrument [Line Items]
Basis point spread on variable interest rate						1.00%
Secured Debt | Revolving Credit Facility | Base Rate | Maximum | Interest Rate Category One
Debt Instrument [Line Items]
Basis point spread on variable interest rate						1.50%
Secured Debt | Senior Term Loan
Debt Instrument [Line Items]
Total debt obligations			0			$ 0					491,875
Secured Debt | Senior Term Loan | LIBOR
Debt Instrument [Line Items]
Basis point spread on variable interest rate		2.75%				2.75%
Secured Debt | Senior Term Loan | LIBOR | Maximum
Debt Instrument [Line Items]
Basis point spread on variable interest rate						1.75%
Secured Debt | Senior Term Loan | Federal Funds Rate
Debt Instrument [Line Items]
Basis point spread on variable interest rate						0.50%
Unsecured notes
Debt Instrument [Line Items]
Total debt obligations			1,757,957			$ 1,757,957					2,012,500
Unsecured notes | 3.125% Senior Convertible Notes
Debt Instrument [Line Items]
Total debt obligations			$ 93,110			$ 93,110					$ 287,500
Stated interest rate			3.125%		3.125%	3.125%		3.125%	3.125%		3.125%
Convertible debt, conversion ratio (in shares per par value)						0.0728554
Convertible debt, conversion price (in dollars per share)			$ 13.73			$ 13.73
Contractual interest			$ 900		$ 2,200	$ 3,200		$ 4,500
Unsecured notes | 4.75% Senior Notes
Debt Instrument [Line Items]
Total debt obligations			$ 767,941			$ 767,941					$ 775,000
Stated interest rate			4.75%			4.75%			4.75%
Unsecured notes | 4.25% Senior Notes
Debt Instrument [Line Items]
Total debt obligations			$ 550,000			$ 550,000					550,000
Stated interest rate			4.25%			4.25%
Unsecured notes | 5.50% Senior Notes
Debt Instrument [Line Items]
Total debt obligations			$ 346,906			$ 346,906					400,000
Stated interest rate			5.50%			5.50%
Other Debt Obligations
Debt Instrument [Line Items]
Total debt obligations			$ 1,857,957			$ 1,857,957					2,604,375
Other Debt Obligations | Trust Preferred Securities
Debt Instrument [Line Items]
Total debt obligations			$ 100,000			$ 100,000					$ 100,000
Basis point spread on variable interest rate						1.50%
[1] Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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