Purchased Receivables - Allowance on Net Purchase Receivables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Purchased Receivable	Dec. 31, 2013 Purchased Receivable
Purchased Receivable Allowance for Loan Loss Reserve [Roll Forward]
Balance at beginning of period	$ 273	$ 323
Charge-offs	329	14	0	150
Recoveries			0	0
Charge-offs net of recoveries			0	150
Reserve of purchased receivables			(37)	100
Balance at end of period	$ 236