Notes Payable Schedule of structured financing notes at fair value (Details) - USD ($)		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total structured financing notes reported at fair value that are secured by credit card receivables and to which we are subordinated		$ 11,131,000	$ 12,276,000
Weighted average interest rate	[1],[2]	5.60%	5.40%
Credit card receivables and restricted cash carrying amount as security for notes payable		$ 11,100,000
Maturity date		Nov. 30, 2035
Loans Pledged as Collateral	[1]	$ 67,900,000	$ 69,900,000
Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Total structured financing notes reported at fair value that are secured by credit card receivables and to which we are subordinated		11,100,000
Amortizing Securitization Facility Expiration Date December 1, 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 101,600,000.0	$ 102,000,000
Weighted average interest rate		6.20%	6.10%
Credit card receivables and restricted cash carrying amount as security for notes payable		$ 11,100,000.0	$ 12,300,000
Maturity date		Dec. 01, 2021
Amortizing Securitization Facility Expiration Date December 1, 2021 [Member] | Notes Payable to Banks [Member]
Debt Instrument [Line Items]
Total structured financing notes reported at fair value that are secured by credit card receivables and to which we are subordinated			$ 12,300,000

[1] (1)Loans are subject to certain affirmative covenants tied to default rates and other performance metrics the failure of which could result in required early repayment of the remaining unamortized balances of the notes.

[2] (2)These notes reflect modifications to either extend the maturity date, increase the loaned amount or both.