Fair Value - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Aug. 31, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred financing costs, net			$ 51,636
Asset-backed securitization
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred financing costs, net			48,400	$ 56,567
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			2,491,234	2,530,210
Convertible debt, fair value			108,148	0
Secured notes payable, fair value			49,828	50,752
Secured debt, fair value			325,000	0
Total debt, fair value			2,974,210	2,580,962
Reported Value Measurement | 2014-SFR 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			456,074	473,755
Reported Value Measurement | 2014-SFR 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			501,810	507,305
Reported Value Measurement | 2014-SFR 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			517,827	523,109
Reported Value Measurement | 2015-SFR 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			543,480	549,121
Reported Value Measurement | 2015-SFR 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			472,043	476,920
Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			2,544,423	2,368,964
Convertible debt, fair value			142,808	0
Secured notes payable, fair value			50,053	48,631
Secured debt, fair value			325,000	0
Total debt, fair value			3,062,284	2,417,595
Estimate of Fair Value Measurement | 2014-SFR 1 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			465,343	472,258
Estimate of Fair Value Measurement | 2014-SFR 2 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			510,941	476,952
Estimate of Fair Value Measurement | 2014-SFR 3 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			530,549	489,448
Estimate of Fair Value Measurement | 2015-SFR 1 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			553,689	496,673
Estimate of Fair Value Measurement | 2015-SFR 2 | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Asset-backed securitization, fair value			483,901	$ 433,633
Secured Debt | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred financing costs, net			$ 3,300
LIBOR | Secured Debt | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable rate		1.80%
LIBOR | Minimum | Secured Debt | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable rate	1.70%
LIBOR | Maximum | Secured Debt | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable rate	2.30%
Base Rate | Minimum | Secured Debt | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable rate	0.70%
Base Rate | Maximum | Secured Debt | Term Loan Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Basis spread on variable rate	1.30%