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Fair Value - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Oct. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net	$ 34,844				$ 34,844	$ 36,421
Gain on derivative recorded in other comprehensive income					9,600
Estimated amount of existing gains to be reclassified in the next 12 months	1,000				1,000
Redemptions of Class A units	0	$ 0	$ 0	$ (28,258)
Treasury Lock | Designated as Hedging Instrument
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, notional amount							$ 350,000
Accumulated deficit
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Redemptions of Class A units				$ 32,215
Asset-backed securitization
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net						31,000
Term Loan facility | Line of Credit
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net						800
Unsecured Senior Notes
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred financing costs, net						4,700
Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	1,949,002				1,949,002	1,961,511
Unsecured senior notes, net	888,113				888,113	492,800
Revolving credit facility	0				0	250,000
Term loan facility	0				0	99,232
Total debt	2,837,115				2,837,115	2,803,543
Carrying Value | 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	480,717				480,717	483,790
Carrying Value | 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	496,024				496,024	499,108
Carrying Value | 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	520,619				520,619	523,865
Carrying Value | 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	451,642				451,642	454,748
Carrying Value | 4.25% Senior Notes Due 2028
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	493,390				493,390	492,800
Carrying Value | 4.90% Senior Notes Due 2029
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	394,723				394,723	0
Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	2,007,620				2,007,620	2,008,239
Unsecured senior notes, net	995,609				995,609	479,730
Revolving credit facility	0				0	250,000
Term loan facility	0				0	100,000
Total debt	3,003,229				3,003,229	2,837,969
Fair Value | 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	492,792				492,792	494,820
Fair Value | 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	512,582				512,582	511,450
Fair Value | 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	534,231				534,231	534,666
Fair Value | 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	468,015				468,015	467,303
Fair Value | 4.25% Senior Notes Due 2028
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	539,945				539,945	479,730
Fair Value | 4.90% Senior Notes Due 2029
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	$ 455,664				$ 455,664	$ 0

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