Allowance for Loan Losses - Loans by Credit Quality Indicators - Performing and Non-Performing (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Allowance for loan losses
Loans	$ 901,461	$ 835,804
Consumer Finance
Allowance for loan losses
Loans	291,755	283,333
Consumer Finance \| Performing
Allowance for loan losses
Loans	290,925	282,293
Consumer Finance \| Nonperforming
Allowance for loan losses
Loans	$ 830	$ 1,040

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant