Modification which Occurred During the Period & Change in Recorded Investment(Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) contract	Dec. 31, 2015 USD ($) contract	Dec. 31, 2014 USD ($) contract
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	50	44	51
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 7,663	$ 6,085	$ 7,609
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 7,705	$ 6,112	$ 7,645
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	6		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 153		$ 8
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 153		$ 8
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	13	8	11
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 932	$ 694	$ 923
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 932	$ 694	$ 926
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	8	8	9
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,808	$ 843	$ 1,535
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 1,850	$ 870	$ 1,568
Small Business [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	3	9	5
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 188	$ 293	$ 133
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 188	$ 293	$ 133
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	10	6	13
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 2,959	$ 2,941	$ 4,329
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 2,959	$ 2,941	$ 4,329
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | contract	10	13	12
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,623	$ 1,314	$ 681
TROUBLED DEBT RESTRUCTURINGS:
Post-Modification Outstanding Recorded Investment	$ 1,623	$ 1,314	$ 681