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Commitments, Contingencies and Concentrations of Credit Risk (Details) - Summary of Financial Instruments - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Supply Commitment [Line Items]    
Off-balance sheet commitements $ 625,609 $ 489,821
Overdraft Protection Lines [Member]    
Supply Commitment [Line Items]    
Off-balance sheet commitements 770 800
Standby Letters of Credit [Member]    
Supply Commitment [Line Items]    
Off-balance sheet commitements 20,895 27,500
Commercial Portfolio Segment [Member] | Supply Commitment [Member]    
Supply Commitment [Line Items]    
Off-balance sheet commitements 278,201 236,447
Home Equity Line of Credit [Member]    
Supply Commitment [Line Items]    
Off-balance sheet commitements 52,191 56,031
Commercial Real Estate Portfolio Segment [Member] | Supply Commitment [Member]    
Supply Commitment [Line Items]    
Off-balance sheet commitements $ 273,552 $ 169,043