Loans - Schedule of Classes Of The Loan Portfolio Summarized By The Aggregate Risk Rating (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 872,023	$ 852,960	$ 825,252
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	827,946	799,176
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	30,830	35,819
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	13,247	17,965
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	122,926	117,692	103,245
Commercial and industrial | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	116,305	112,037
Commercial and industrial | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,974	3,744
Commercial and industrial | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,647	1,911
Commercial and industrial | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	309,161	289,899	279,614
Commercial real estate | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	278,468	252,071
Commercial real estate | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	20,466	23,421
Commercial real estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,227	14,407
Commercial real estate | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Commercial real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	13,243	13,429	15,057
Commercial real estate construction | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	11,571	11,087
Commercial real estate construction | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,259	1,968
Commercial real estate construction | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	413	374
Commercial real estate construction | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	346,422	357,228	352,651
Residential mortgage | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	342,036	350,537
Residential mortgage | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,553	5,548
Residential mortgage | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	833	1,143
Residential mortgage | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Home equity lines of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	65,689	60,124	59,639
Home equity lines of credit | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	64,984	58,856
Home equity lines of credit | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	578	1,138
Home equity lines of credit | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	127	130
Home equity lines of credit | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	14,582	14,588	$ 15,046
Consumer | Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	14,582	14,588
Consumer | Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Consumer | Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 0	$ 0