Purchased Receivables - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) Segment purchased_receivable	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Segment purchased_receivable	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) purchased_receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term of purchased receivables (less than)			1 year
Number of classes of purchased receivables | Segment	1		1
Loans classified as troubled debt restructuring	$ 16,255,000		$ 16,255,000		$ 13,700,000
Charge-offs	$ (22,000)	$ (400,000)	$ (891,000)	$ (588,000)
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