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Loans and Allowance for Loan Losses - Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Financing Receivable, Modifications [Line Items]    
Loans on nonaccrual $ 1,445 $ 1,415
Trouble Debt Restructuring [Member]    
Financing Receivable, Modifications [Line Items]    
Loans that met criteria for restructured 552 608
Loans on nonaccrual $ 251 $ 442