Commitments, Contingencies and Concentrations of Credit Risk (Details) - Summary of Financial Instruments - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Supply Commitment [Line Items]
Off-balance sheet commitements	$ 603,112	$ 625,609
Commercial Portfolio Segment [Member] | Supply Commitment [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	267,865	278,201
Home Equity Line of Credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	52,788	52,191
Commercial Real Estate Portfolio Segment [Member] | Supply Commitment [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	263,395	273,552
Standby Letters of Credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	18,331	20,895
Overdraft Protection Lines [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	$ 733	$ 770