Purchased Receivables - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) Segment purchased_receivable	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) Segment purchased_receivable	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) purchased_receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of purchased receivables (less than)			1 year
Number of segments and classes of purchased receivables | Segment	1		1
Loans classified as troubled debt restructuring	$ 12,500,000		$ 12,500,000		$ 13,700,000
Charge-offs	$ (135,000)	$ 0	$ (869,000)	$ (188,000)
Purchased Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of purchased receivables past due | purchased_receivable	0		0		0
Loans classified as troubled debt restructuring	$ 0		$ 0		$ 0
Charge-offs	$ 0	$ 0	$ 0	$ 0