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Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Apr. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt, gross	$ 3,456,214,000		$ 3,456,214,000				$ 2,848,492,000
Unamortized discounts on unsecured senior notes	(3,416,000)		(3,416,000)				(3,658,000)
Deferred financing costs, net	(24,484,000)		(24,484,000)				(27,422,000)
Total debt per balance sheet	3,428,314,000		3,428,314,000				2,817,412,000
Amortization of financing costs			3,828,000	$ 3,697,000
Asset-backed Securitizations, Unsecured Senior Notes and Term Loan Facility
Debt Instrument [Line Items]
Amortization of financing costs	1,500,000	$ 1,500,000	3,000,000.0	$ 3,000,000.0
Secured Debt
Debt Instrument [Line Items]
Debt, gross	$ 1,936,214,000		$ 1,936,214,000				1,948,492,000
Secured Debt | 2014-SFR 2
Debt Instrument [Line Items]
Interest Rate	4.42%		4.42%
Debt, gross	$ 476,810,000		$ 476,810,000				479,981,000
Secured Debt | 2014-SFR 3
Debt Instrument [Line Items]
Interest Rate	4.40%		4.40%
Debt, gross	$ 492,208,000		$ 492,208,000				495,392,000
Secured Debt | 2015-SFR 1
Debt Instrument [Line Items]
Interest Rate	4.14%		4.14%
Debt, gross	$ 517,741,000		$ 517,741,000				520,957,000
Secured Debt | 2015-SFR 2
Debt Instrument [Line Items]
Interest Rate	4.36%		4.36%
Debt, gross	$ 449,455,000		$ 449,455,000				452,162,000
Senior Notes | 2028 unsecured senior notes, net
Debt Instrument [Line Items]
Interest Rate	4.25%		4.25%
Effective interest rate	4.08%		4.08%
Debt, gross	$ 500,000,000		$ 500,000,000				500,000,000
Senior Notes | 2029 unsecured senior notes, net
Debt Instrument [Line Items]
Interest Rate	4.90%		4.90%
Debt, gross	$ 400,000,000		$ 400,000,000				400,000,000
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest Rate	1.20%		1.20%
Debt, gross	$ 620,000,000		$ 620,000,000				0
Maximum borrowing capacity	1,250,000,000		1,250,000,000		$ 1,250,000,000	$ 800,000,000
Outstanding letters of credit	$ 1,200,000		$ 1,200,000				$ 1,500,000
Line of Credit | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate			1.10%

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Amount of amortization expense attributable to debt issuance costs.

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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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Amount, after accumulated amortization, of debt discount.

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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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