Commitments, Contingencies and Concentrations of Credit Risk (Details) - Summary of Financial Instruments - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Supply Commitment [Line Items]
Off-balance sheet commitements	$ 858,045	$ 678,137
Commercial Portfolio Segment [Member] | Supply Commitment [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	425,189	344,142
Home Equity Line of Credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	39,965	44,483
Commercial Real Estate Portfolio Segment [Member] | Supply Commitment [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	355,914	254,710
Standby Letters of Credit [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	36,141	34,114
Overdraft Protection Lines [Member]
Supply Commitment [Line Items]
Off-balance sheet commitements	$ 836	$ 688