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Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Feb. 28, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt, gross	$ 2,871,649,000			$ 2,517,216,000
Unamortized discounts on unsecured and exchangeable senior notes	(3,412,000)			(895,000)
Equity component of exchangeable senior notes	(1,746,000)			(2,408,000)
Deferred financing costs, net	(41,634,000)			(38,026,000)
Total debt per balance sheet	2,824,857,000			2,475,887,000
Amortization of financing costs	1,900,000	$ 2,562,000
Revolving Credit Facility
Debt Instrument [Line Items]
Deferred financing costs, net	(8,300,000)			(8,800,000)
Asset-backed Securitizations, Unsecured Senior Notes and Term Loan Facility
Debt Instrument [Line Items]
Amortization of financing costs	1,400,000	$ 2,200,000
Secured Debt
Debt Instrument [Line Items]
Debt, gross	$ 2,008,045,000			2,013,357,000
Secured Debt | 2014-SFR 2
Debt Instrument [Line Items]
Interest Rate	4.42%
Debt, gross	$ 495,043,000			496,326,000
Secured Debt | 2014-SFR 3
Debt Instrument [Line Items]
Interest Rate	4.40%
Debt, gross	$ 510,721,000			512,041,000
Secured Debt | 2015-SFR 1
Debt Instrument [Line Items]
Interest Rate	4.14%
Debt, gross	$ 536,341,000			537,723,000
Secured Debt | 2015-SFR 2
Debt Instrument [Line Items]
Interest Rate	4.36%
Debt, gross	$ 465,940,000			467,267,000
Secured Debt | Secured Note Payable
Debt Instrument [Line Items]
Interest Rate	4.06%
Debt, gross	$ 48,604,000			48,859,000
Senior Notes | 4.25% Senior Notes Due 2028
Debt Instrument [Line Items]
Interest Rate	4.25%		4.25%
Debt, gross	$ 500,000,000			0
Effective interest rate	4.08%
Deferred financing costs, net			$ (1,800,000)
Convertible Debt | 3.25% Exchangeable Senior Notes
Debt Instrument [Line Items]
Interest Rate	3.25%
Debt, gross	$ 115,000,000			115,000,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Debt, gross	$ 0			140,000,000
Effective interest rate	3.08%
Credit facility amount, maximum	$ 800,000,000
Line of Credit | Revolving Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.825%
Line of Credit | Revolving Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.55%
Line of Credit | Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Line of Credit | Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.55%
Line of Credit | Term Loan facility
Debt Instrument [Line Items]
Debt, gross	$ 200,000,000			200,000,000
Effective interest rate	3.23%
Deferred financing costs, net	$ (1,900,000)			$ (2,000,000)
Credit facility amount, maximum	$ 200,000,000
Line of Credit | Term Loan facility | LIBOR | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.90%
Line of Credit | Term Loan facility | LIBOR | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.75%
Line of Credit | Term Loan facility | Base Rate | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Line of Credit | Term Loan facility | Base Rate | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.75%

X

- 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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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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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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