v3.7.0.1
Loans - Composition of TDRs by Accrual and Nonaccrual Status (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]    
Troubled Debt Restructurings, Nonaccrual $ 7,701 $ 8,238
Troubled Debt Restructurings, Total   3,100
Commercial and Industrial Loans    
Accounts Notes And Loans Receivable [Line Items]    
Troubled Debt Restructurings, Nonaccrual 2,927 3,359
Principal Reduction and Extended Maturity | Commercial and Industrial Loans    
Accounts Notes And Loans Receivable [Line Items]    
Troubled Debt Restructurings, Accrual 272 317
Troubled Debt Restructurings, Nonaccrual 2,677 3,109
Troubled Debt Restructurings, Total $ 2,949 $ 3,426