Notes Payable Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Notes payable associated with structured financings, at fair value	$ 18,069	$ 20,970
Credit card receivables and restricted cash carrying amount as security for notes payable	18,100
Maximum Aggregate Exposure to Pretax Equity Loss Associated With Structured Financing at Fair Value	0
CAR revolving credit facility	$ 29,900	$ 28,900