Debt - Long-term Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 2,870,993,000	$ 2,842,510,000
Unamortized discount on unsecured senior notes	(4,143,000)	(2,546,000)
Deferred financing costs, net	(33,353,000)	(36,421,000)
Total debt per balance sheet	2,833,497,000	2,803,543,000
Amortization of debt issuance costs	7,457,000	10,493,000	$ 11,712,000
Asset-Backed Securitizations, Unsecured Senior Notes and Term Loan Facility
Debt Instrument [Line Items]
Amortization of debt issuance costs	5,900,000	5,800,000	$ 6,400,000
Secured Debt
Debt Instrument [Line Items]
Total debt	$ 1,970,993,000	1,992,510,000
Secured Debt | 2014-SFR 2
Debt Instrument [Line Items]
Interest rate	4.42%
Total debt	$ 485,828,000	491,195,000
Secured Debt | 2014-SFR 3
Debt Instrument [Line Items]
Interest rate	4.40%
Total debt	$ 501,393,000	506,760,000
Secured Debt | 2015-SFR 1
Debt Instrument [Line Items]
Interest rate	4.14%
Total debt	$ 526,560,000	532,197,000
Secured Debt | 2015-SFR 2
Debt Instrument [Line Items]
Interest rate	4.36%
Total debt	$ 457,212,000	462,358,000
Exchangeable senior notes | 4.25% Senior Notes Due 2028
Debt Instrument [Line Items]
Interest rate	4.25%				4.25%
Effective interest rate	4.08%
Total debt	$ 500,000,000	500,000,000
Deferred financing costs, net					$ (1,900,000)
Exchangeable senior notes | 4.90 Percent Senior Notes Due 2029
Debt Instrument [Line Items]
Interest rate				4.90%
Effective interest rate	4.90%
Total debt	$ 400,000,000	0
Deferred financing costs, net				$ (1,000,000.0)
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Effective interest rate	2.96%
Total debt	$ 0	250,000,000
Credit facility maximum borrowing capacity	800,000,000.0
Letters of credit outstanding	$ 6,200,000	1,100,000
Line of Credit | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.20%
Line of Credit | Term loan facility, net
Debt Instrument [Line Items]
Total debt	$ 0	100,000,000
Deferred financing costs, net		$ (800,000)
Line of Credit | Term loan facility, net | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.20%