Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt, gross	$ 2,382,871,000		$ 2,382,871,000			$ 2,981,062,000
Unamortized discount on exchangeable senior notes	(1,156,000)		(1,156,000)			(1,883,000)
Equity component of exchangeable senior notes	(3,073,000)		(3,073,000)			(4,969,000)
Deferred financing costs, net	(39,407,000)		(39,407,000)			(51,636,000)
Total debt per balance sheet	2,339,235,000		2,339,235,000			2,922,574,000
Amortization of financing costs			6,285,000	$ 7,912,000
Asset-Backed Securitizations and Term Loan Facility
Debt Instrument [Line Items]
Amortization of financing costs	1,400,000	$ 2,200,000	5,000,000	6,300,000
Secured Debt
Debt Instrument [Line Items]
Debt, gross	2,018,764,000		2,018,764,000			2,491,234,000
Secured Debt | 2014-SFR 1
Debt Instrument [Line Items]
Debt, gross	$ 0		$ 0			456,074,000
Secured Debt | 2014-SFR 2
Debt Instrument [Line Items]
Interest rate (as a percent)	4.42%		4.42%
Debt, gross	$ 497,743,000		$ 497,743,000			501,810,000
Secured Debt | 2014-SFR 3
Debt Instrument [Line Items]
Interest rate (as a percent)	4.40%		4.40%
Debt, gross	$ 513,361,000		$ 513,361,000			517,827,000
Secured Debt | 2015-SFR 1
Debt Instrument [Line Items]
Interest rate (as a percent)	4.14%		4.14%
Debt, gross	$ 539,199,000		$ 539,199,000			543,480,000
Secured Debt | 2015-SFR 2
Debt Instrument [Line Items]
Interest rate (as a percent)	4.36%		4.36%
Debt, gross	$ 468,461,000		$ 468,461,000			472,043,000
Secured Debt | Secured Note Payable
Debt Instrument [Line Items]
Interest rate (as a percent)	4.06%		4.06%
Debt, gross	$ 49,107,000		$ 49,107,000			$ 49,828,000
Convertible Debt | 3.25% Exchangeable Senior Notes
Debt Instrument [Line Items]
Interest rate (as a percent)	3.25%		3.25%			3.25%
Debt, gross	$ 115,000,000		$ 115,000,000			$ 115,000,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate (as a percent)	2.43%		2.43%
Debt, gross	$ 0		$ 0			0
Credit facility amount, maximum	800,000,000		800,000,000		$ 800,000,000
Amortization of financing costs	$ 500,000	$ 500,000	$ 1,300,000	$ 1,900,000
Line of Credit | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			1.20%
Line of Credit | Revolving Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			0.825%
Line of Credit | Revolving Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			1.55%
Line of Credit | Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			0.00%
Line of Credit | Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			0.55%
Line of Credit | Term Loan facility
Debt Instrument [Line Items]
Interest rate (as a percent)	2.58%		2.58%
Debt, gross	$ 200,000,000		$ 200,000,000			325,000,000
Deferred financing costs, net	(2,100,000)		(2,100,000)			$ (3,300,000)
Credit facility amount, maximum	$ 200,000,000		$ 200,000,000		$ 200,000,000
Line of Credit | Term Loan facility | LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			1.35%
Line of Credit | Term Loan facility | LIBOR | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			0.90%
Line of Credit | Term Loan facility | LIBOR | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			1.75%
Line of Credit | Term Loan facility | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			0.00%
Line of Credit | Term Loan facility | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)			0.75%