Purchased Receivables - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) Segment	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) purchased_receivable Segment	Sep. 30, 2014 USD ($) purchased_receivable	Dec. 31, 2014 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of segments and classes of purchased receivables | Segment	1		1
Loans classified as troubled debt restructuring	$ 5,104,000		$ 5,104,000		$ 7,700,000
Financing Receivable, Allowance for Credit Losses, Write-downs	400,000	$ 54,000	$ 588,000	$ 446,000
Purchased Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of purchased receivables past due | purchased_receivable			0	0
Loans classified as troubled debt restructuring	0		$ 0		$ 0
Financing Receivable, Allowance for Credit Losses, Write-downs	$ 0	$ 0	$ 0	$ 240,000
Partial Loan | Purchased Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs				215,000
Full Loan | Purchased Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs				$ 25,000