Purchased Receivables - Additional Information (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) Segment	Dec. 31, 2014 USD ($) loan	Dec. 31, 2013 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Average holding of purchased receivables	1 year
Charge-offs	$ 826,000	$ 625,000	$ 1,196,000
Number of segments and classes of purchased receivables | Segment	1
Purchased receivables past due	$ 4,836,000	5,955,000
Total modifications	13,740,000	$ 7,700,000
Number of full charge-off | loan		1
Number of partial charge-off | loan		1
Purchased Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Charge-offs	0	$ 793,000
Purchased receivables past due	0	0
Total modifications	$ 0	$ 0	$ 0