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Debt - Schedule of Debt (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jul. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt, gross	$ 3,580,431,000		$ 3,580,431,000					$ 2,848,492,000
Unamortized discounts on unsecured senior notes	(15,900,000)		(15,900,000)					(3,658,000)
Deferred financing costs, net	(29,867,000)		(29,867,000)					(27,422,000)
Total debt per balance sheet	3,534,664,000		3,534,664,000					2,817,412,000
Amortization of financing costs			6,290,000	$ 5,564,000
Asset-backed Securitizations, Unsecured Senior Notes and Term Loan Facility
Debt Instrument [Line Items]
Amortization of financing costs	1,500,000	$ 1,500,000	4,500,000	$ 4,500,000
Secured Debt
Debt Instrument [Line Items]
Debt, gross	$ 1,930,431,000		$ 1,930,431,000					1,948,492,000
Secured Debt | 2014-SFR 2
Debt Instrument [Line Items]
Interest Rate	4.42%		4.42%
Debt, gross	$ 475,336,000		$ 475,336,000					479,981,000
Secured Debt | 2014-SFR 3
Debt Instrument [Line Items]
Interest Rate	4.40%		4.40%
Debt, gross	$ 490,585,000		$ 490,585,000					495,392,000
Secured Debt | 2015-SFR 1
Debt Instrument [Line Items]
Interest Rate	4.14%		4.14%
Debt, gross	$ 516,249,000		$ 516,249,000					520,957,000
Secured Debt | 2015-SFR 2
Debt Instrument [Line Items]
Interest Rate	4.36%		4.36%
Debt, gross	$ 448,261,000		$ 448,261,000					452,162,000
Senior Notes | 2028 unsecured senior notes
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
Debt Instrument [Line Items]
Interest Rate	4.90%		4.90%
Debt, gross	$ 400,000,000		$ 400,000,000					400,000,000
Senior Notes | 2031 unsecured senior notes
Debt Instrument [Line Items]
Interest Rate	2.38%		2.38%		2.375%
Effective interest rate	2.46%		2.46%
Debt, gross	$ 450,000,000		$ 450,000,000					0
Senior Notes | 2051 unsecured senior notes
Debt Instrument [Line Items]
Interest Rate	3.38%		3.38%		3.375%
Debt, gross	$ 300,000,000		$ 300,000,000					0
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Interest Rate	1.18%		1.18%
Debt, gross	$ 0		$ 0					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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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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