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Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Debt, gross	$ 2,480,787,000		$ 2,480,787,000		$ 2,981,062,000
Unamortized discount on exchangeable senior notes	(1,414,000)		(1,414,000)		(1,883,000)
Equity component of exchangeable senior notes	(3,724,000)		(3,724,000)		(4,969,000)
Deferred financing costs, net	(40,946,000)		(40,946,000)		(51,636,000)
Total debt per balance sheet	2,434,703,000		2,434,703,000		2,922,574,000
Amortization of financing costs			4,410,000	$ 5,279,000
Asset-Backed Securitizations and Term Loan Facility
Debt Instrument [Line Items]
Amortization of financing costs	1,400,000	$ 2,100,000	3,600,000	4,100,000
Secured Debt
Debt Instrument [Line Items]
Debt, gross	2,024,441,000		2,024,441,000		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	$ 499,245,000		$ 499,245,000		501,810,000
Secured Debt | 2014-SFR 3
Debt Instrument [Line Items]
Interest rate (as a percent)	4.40%		4.40%
Debt, gross	$ 514,824,000		$ 514,824,000		517,827,000
Secured Debt | 2015-SFR 1
Debt Instrument [Line Items]
Interest rate (as a percent)	4.14%		4.14%
Debt, gross	$ 540,717,000		$ 540,717,000		543,480,000
Secured Debt | 2015-SFR 2
Debt Instrument [Line Items]
Interest rate (as a percent)	4.36%		4.36%
Debt, gross	$ 469,655,000		$ 469,655,000		472,043,000
Secured Debt | Secured Note Payable
Debt Instrument [Line Items]
Interest rate (as a percent)	4.06%		4.06%
Debt, gross	$ 49,346,000		$ 49,346,000		$ 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)	2.42%		2.42%
Debt, gross	$ 92,000,000		$ 92,000,000		0
Credit facility amount, maximum	800,000,000		800,000,000
Amortization of financing costs	$ 400,000	$ 700,000	$ 800,000	$ 1,300,000
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)	2.57%		2.57%
Debt, gross	$ 200,000,000		$ 200,000,000		325,000,000
Deferred financing costs, net	(2,000,000)		(2,000,000)		$ (3,300,000)
Credit facility amount, maximum	$ 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%

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- Definition

Amount of amortization expense attributable to debt issuance costs.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt discount.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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