Fair Value - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Carrying Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	$ 1,931,725	$ 1,945,044
Unsecured senior notes, net	889,467	888,453
Revolving credit facility	0	0
Total debt	2,821,192	2,833,497
Carrying Value \| 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	476,360	479,706
Carrying Value \| 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	491,180	495,029
Carrying Value \| 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	516,367	519,576
Carrying Value \| 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	447,818	450,733
Carrying Value \| 2028 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	494,181	493,589
Carrying Value \| 2029 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	395,286	394,864
Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	1,990,110	2,002,877
Unsecured senior notes, net	1,045,783	978,598
Revolving credit facility	0	0
Total debt	3,035,893	2,981,475
Fair Value \| 2014-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	490,024	491,302
Fair Value \| 2014-SFR 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	506,204	510,486
Fair Value \| 2015-SFR 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	531,225	534,531
Fair Value \| 2015-SFR 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset-backed securitization	462,657	466,558
Fair Value \| 2028 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	568,775	531,870
Fair Value \| 2029 unsecured senior notes, net
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Unsecured senior notes, net	$ 477,008	$ 446,728

Unsecured Debt, Fair Value Disclosure

No definition available.

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Data Type:	xbrli:monetaryItemType
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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
-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

+ References

No definition available.

+ Details

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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