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Loans - Carrying Amount of Purchased Credit Impaired Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Accounts Notes And Loans Receivable [Line Items]    
Total impaired loans $ 8,960 $ 2,457
Unaccreted discount on purchased credit impaired loans (2,298) (651)
Receivables Acquired with Deteriorated Credit Quality    
Accounts Notes And Loans Receivable [Line Items]    
Total 6,662 1,806
Commercial Real Estate | Receivables Acquired with Deteriorated Credit Quality    
Accounts Notes And Loans Receivable [Line Items]    
Total 358 200
Commercial and Industrial Loans    
Accounts Notes And Loans Receivable [Line Items]    
Total impaired loans 6,788 2,002
Commercial and Industrial Loans | Receivables Acquired with Deteriorated Credit Quality    
Accounts Notes And Loans Receivable [Line Items]    
Total 5,163 1,559
Consumer Loans    
Accounts Notes And Loans Receivable [Line Items]    
Total impaired loans 19 249
Consumer Loans | Receivables Acquired with Deteriorated Credit Quality    
Accounts Notes And Loans Receivable [Line Items]    
Total   47
Real Estate Loans    
Accounts Notes And Loans Receivable [Line Items]    
Total impaired loans 2,153 206
Real Estate Loans | Commercial Real Estate    
Accounts Notes And Loans Receivable [Line Items]    
Total impaired loans 537 $ 206
Real Estate Loans | Land    
Accounts Notes And Loans Receivable [Line Items]    
Total impaired loans $ 1,616