Purchased Receivables - Summary of Allowance for Loan Losses Purchased Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of year	$ 289	$ 273
Charge-offs	(826)	(625)	$ (1,196)
Balance at end of year	181	289	$ 273
Purchased Receivable
Allowance for Loan and Lease Losses [Roll Forward]
Charge-offs	0	(793)
Recoveries	30	105
Net recoveries (charge-offs)	30	(688)
Change in reserve for purchased receivables	$ (138)	$ 704