Purchased Receivables - Allowance on Net Purchase Receivables (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Balance at beginning of period	$ 163,000	$ 247,000	$ 181,000	$ 289,000
Charge-offs	(22,000)	(400,000)	(891,000)	(588,000)
Balance at end of period	163,000	224,000	163,000	224,000
Purchased Receivable
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Charge-offs	0	0	0	0
Recoveries	0	0	0	30,000
Charge-offs net of recoveries	0	0	0	30,000
Reserve for (recovery from) purchased receivables	$ 0	$ (23,000)	$ (18,000)	$ (95,000)