Purchased Receivables - Allowance on Net Purchase Receivables (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Balance at beginning of period	$ 171,000	$ 181,000
Charge-offs	(279,000)	(734,000)
Balance at end of period	183,000	169,000
Purchased Receivable
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Charge-offs	0	0
Recoveries	0	0
Charge-offs net of recoveries	0	0
Reserve for (recovery from) purchased receivables	$ 12,000	$ (12,000)