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Fair Value - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Designated as Hedging Instrument | Treasury Lock
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative, notional amount	$ 400,000
Derivative, fair value	9,200
Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	1,922,734	$ 1,927,607
Unsecured senior notes, net	890,143	889,805
Revolving credit facility	80,000	0
Total debt	2,892,877	2,817,412
Carrying Value | 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	473,879	475,144
Carrying Value | 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	489,107	490,319
Carrying Value | 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	513,956	515,326
Carrying Value | 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	445,792	446,818
Carrying Value | 2028 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	494,576	494,378
Carrying Value | 2029 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	395,567	395,427
Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	1,976,170	1,983,083
Unsecured senior notes, net	1,005,943	1,057,496
Revolving credit facility	80,000	0
Total debt	3,062,113	3,040,579
Fair Value | 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	485,779	488,140
Fair Value | 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	502,724	504,364
Fair Value | 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	527,535	529,542
Fair Value | 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	460,132	461,037
Fair Value | 2028 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	549,755	575,220
Fair Value | 2029 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	$ 456,188	$ 482,276

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- Definition

Unsecured Debt, Fair Value Disclosure

+ References

No definition available.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
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Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
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