Fair Value - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Carrying Value
Asset-backed securitizations, net	$ 2,795,777	$ 2,473,643
Asset-backed securitization, net of discount, carrying value	2,848,270	2,530,210
Exchangeable senior notes, carrying value	106,434	0
Notes payable, carrying value	50,295	50,752
Credit facility, carrying value	142,000	0
Total debt, carrying value	3,146,999	2,580,962
Fair Value
Deferred financing costs, net	(52,493)	(56,567)
Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	2,888,538	2,368,964
Exchangeable senior notes, fair value	106,434	0
Notes payable, fair value	50,351	48,631
Credit facility, fair value	142,000	0
Total debt, fair value	3,187,323	2,417,595
2014-SFR 1
Carrying Value
Asset-backed securitizations, net	471,351	473,755
2014-SFR 1 \| Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	473,227	472,258
ARP 2014-SFR1
Carrying Value
Asset-backed securitizations, net	330,822	0
ARP 2014-SFR1 \| Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	330,822	0
2014-SFR 2
Carrying Value
Asset-backed securitizations, net	504,739	507,305
2014-SFR 2 \| Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	512,232	476,952
2014-SFR 3
Carrying Value
Asset-backed securitizations, net	520,468	523,109
2014-SFR 3 \| Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	532,360	489,448
2015-SFR 1
Carrying Value
Asset-backed securitizations, net	546,358	549,121
2015-SFR 1 \| Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	554,836	496,673
2015-SFR 2
Carrying Value
Asset-backed securitizations, net	474,532	476,920
2015-SFR 2 \| Significant Unobservable Inputs (Level 3)
Fair Value
Asset-backed securitization, fair value	485,061	433,633
Senior Secured Revolving Credit Facility
Carrying Value
Credit facility, carrying value	$ 142,000	$ 0
Until March 2017 \| Senior Secured Revolving Credit Facility
Fair Value
Debt instrument, basis spread on variable rate	2.75%

Long-term Debt, Before Issuances Costs, Net of Discounts

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- Definition

Secured Debt, Asset-Backed Securitizations, Before Issuance Costs, Net of Discount

+ References

No definition available.

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- Definition

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16(a)(2))
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Convertible Security
-URI http://asc.fasb.org/extlink&oid=6509036

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ 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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Paragraph 12
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- References

No definition available.

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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Line-of-Credit Arrangement
-URI http://asc.fasb.org/extlink&oid=6517033

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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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- References

No definition available.

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- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

+ Details

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- Definition

Fair value portion of notes payable.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20,22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

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