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Debt - Long-term Debt (Details)		1 Months Ended					12 Months Ended
	Mar. 07, 2013 USD ($)	Sep. 30, 2015	Mar. 31, 2015	Nov. 30, 2014	Sep. 30, 2014	May. 31, 2014 extension_option	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2013 USD ($)
Debt Instrument [Line Items]
Asset-backed securitizations							$ 2,530,210,000	$ 1,519,390,000
Secured note payable							50,752,000	51,644,000
Credit facility							0	207,000,000
Total debt							$ 2,580,962,000	$ 1,778,034,000
2014-SFR 1
Debt Instrument [Line Items]
Interest rate							1.97%	1.79%
Asset-backed securitizations								$ 478,565,000
Debt instrument term						2 years
Number of debt instrument extension options | extension_option						3
Period of extension options						12 months
2014-SFR 1 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate						0.25%
2014-SFR 2
Debt Instrument [Line Items]
Interest rate							4.42%	4.42%
Asset-backed securitizations								$ 512,435,000
2014-SFR 3
Debt Instrument [Line Items]
Interest rate							4.40%	4.40%
Asset-backed securitizations								$ 528,390,000
2015-SFR 1
Debt Instrument [Line Items]
Interest rate							4.14%	4.14%
Asset-backed securitizations								$ 0
2015-SFR 2
Debt Instrument [Line Items]
Interest rate							4.36%	4.36%
Asset-backed securitizations								$ 0
Single family homes | 2014-SFR 1
Debt Instrument [Line Items]
Asset-backed securitizations							$ 473,755,000
Number of debt instrument extension options | extension_option						3
Period of extension options							12 months
Single family homes | 2014-SFR 2
Debt Instrument [Line Items]
Asset-backed securitizations							$ 507,305,000
Debt instrument term					10 years
Single family homes | 2014-SFR 3
Debt Instrument [Line Items]
Asset-backed securitizations							$ 523,109,000
Debt instrument term				10 years
Senior Notes | Notes Payable
Debt Instrument [Line Items]
Interest rate							4.06%	4.06%
Secured note payable							$ 50,752,000	$ 51,644,000
Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate							3.18%	3.00%
Credit facility							$ 0	$ 207,000,000
Credit facility maximum borrowing capacity	$ 500,000,000						$ 800,000,000.0		$ 800,000,000
Weighted Average | 2014-SFR 1 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate						1.54%
Until March 2017 | Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%						2.75%
March 2017 and Thereafter | Senior Secured Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	3.125%						3.125%
Special Purpose Entity | 2015-SFR 1
Debt Instrument [Line Items]
Asset-backed securitizations							$ 549,121,000
Debt instrument term			30 years
Special Purpose Entity | 2015-SFR 2
Debt Instrument [Line Items]
Asset-backed securitizations							$ 476,920,000
Debt instrument term		30 years

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Carrying value as of the balance sheet date, of debt obligations collateralized by single family properties.

+ References

No definition available.

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

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Contractual interest rate for funds borrowed, under the debt agreement.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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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.

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