Fair Value - Carrying Value and Fair Value (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Oct. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net	$ 38,522,000	$ 36,421,000
Gain on derivative recorded in other comprehensive income	9,600,000
Treasury Lock | Designated as Hedging Instrument
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, notional amount			$ 350,000,000
Revolving Credit Facility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net	$ 6,400,000	6,900,000
Revolving Credit Facility | Line of Credit | LIBOR | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	0.825%
Revolving Credit Facility | Line of Credit | LIBOR | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	1.55%
Revolving Credit Facility | Line of Credit | Base Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Revolving Credit Facility | Line of Credit | Base Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	0.55%
Asset-backed securitization
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net	$ 29,800,000	31,000,000
Term Loan facility | Line of Credit
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net	$ 700,000	800,000
Term Loan facility | Line of Credit | LIBOR | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	0.90%
Term Loan facility | Line of Credit | LIBOR | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	1.75%
Term Loan facility | Line of Credit | Base Rate | Minimum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Term Loan facility | Line of Credit | Base Rate | Maximum
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, basis spread on variable rate	0.75%
Unsecured Senior Notes
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net	$ 8,100,000	4,700,000
Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	1,986,953,000	1,992,510,000
Unsecured senior notes, net	895,494,000	497,454,000
Revolving credit facility	0	250,000,000
Term loan facility	100,000,000	100,000,000
Total debt	2,982,447,000	2,839,964,000
Carrying Value | 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	489,801,000	491,195,000
Carrying Value | 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	505,439,000	506,760,000
Carrying Value | 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	530,816,000	532,197,000
Carrying Value | 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	460,897,000	462,358,000
Carrying Value | 4.25% Senior Notes Due 2028
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	497,524,000	497,454,000
Carrying Value | 4.90% Senior Notes Due 2029
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	397,970,000	0
Fair Value | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	2,002,059,000	2,008,239,000
Unsecured senior notes, net	908,243,000	479,730,000
Revolving credit facility	0	250,000,000
Term loan facility	100,000,000	100,000,000
Total debt	3,010,302,000	2,837,969,000
Fair Value | 2014-SFR 2 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	492,993,000	494,820,000
Fair Value | 2014-SFR 3 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	510,007,000	511,450,000
Fair Value | 2015-SFR 1 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	533,069,000	534,666,000
Fair Value | 2015-SFR 2 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	465,990,000	467,303,000
Fair Value | 4.25% Senior Notes Due 2028 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	493,835,000	479,730,000
Fair Value | 4.90% Senior Notes Due 2029 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	$ 414,408,000	$ 0