Loans Troubled Debt Restructurings (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 contract	Dec. 31, 2013 contract
Financing Receivable, Modifications [Line Items]
Additional commitments to lend funds to debtors whose terms have been modified in a TDR	$ 40,000
Originated Loan
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR that subsequently defaulted	3	3
Recorded investment in loans modified as a TDR that subsequently defaulted	61,000	69,000
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Originated Loan | Commercial real estate, other
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	0	2
Pre-modification recorded investment in loans modified as TDR	0	486,000
Post-modification recorded investment in loans modified as TDR	0	486,000
Total Recorded Investment	0	461,000
Originated Loan | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR		1
Pre-modification recorded investment in loans modified as TDR		5,000
Post-modification recorded investment in loans modified as TDR		5,000
Total Recorded Investment		5,000
Originated Loan | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	0
Pre-modification recorded investment in loans modified as TDR	0
Post-modification recorded investment in loans modified as TDR	0
Total Recorded Investment	0
Originated Loan | Residential real estate
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	22	21
Pre-modification recorded investment in loans modified as TDR	996,000	1,109,000
Post-modification recorded investment in loans modified as TDR	997,000	1,112,000
Total Recorded Investment	967,000	913,000
Number of contracts modified as a TDR that subsequently defaulted	1	2
Recorded investment in loans modified as a TDR that subsequently defaulted	33,000	63,000
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted		0
Originated Loan | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	12	5
Pre-modification recorded investment in loans modified as TDR	238,000	89,000
Post-modification recorded investment in loans modified as TDR	238,000	89,000
Total Recorded Investment	232,000	88,000
Number of contracts modified as a TDR that subsequently defaulted	2	1
Recorded investment in loans modified as a TDR that subsequently defaulted	28,000	6,000
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Originated Loan | Consumer
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	10	37
Pre-modification recorded investment in loans modified as TDR	108,000	279,000
Post-modification recorded investment in loans modified as TDR	108,000	279,000
Total Recorded Investment	102,000	142,000
Acquired Loans
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR that subsequently defaulted	1	0
Recorded investment in loans modified as a TDR that subsequently defaulted	56,000	0
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0	0
Acquired Loans | Commercial real estate, construction
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	1	0
Pre-modification recorded investment in loans modified as TDR	96,000	0
Post-modification recorded investment in loans modified as TDR	96,000	0
Total Recorded Investment	96,000	0
Acquired Loans | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR		0
Pre-modification recorded investment in loans modified as TDR		0
Post-modification recorded investment in loans modified as TDR		0
Total Recorded Investment		0
Acquired Loans | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	3
Pre-modification recorded investment in loans modified as TDR	605,000
Post-modification recorded investment in loans modified as TDR	605,000
Total Recorded Investment	594,000
Acquired Loans | Residential real estate
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	4	2
Pre-modification recorded investment in loans modified as TDR	235,000	107,000
Post-modification recorded investment in loans modified as TDR	235,000	107,000
Total Recorded Investment	234,000	107,000
Number of contracts modified as a TDR that subsequently defaulted	1	0
Recorded investment in loans modified as a TDR that subsequently defaulted	56,000	0
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted		0
Acquired Loans | Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Impact on allowance for loan losses for loans modified as a TDR that subsequently defaulted	0
Acquired Loans | Consumer
Financing Receivable, Modifications [Line Items]
Number of contracts modified as a TDR	5	0
Pre-modification recorded investment in loans modified as TDR	9,000	0
Post-modification recorded investment in loans modified as TDR	9,000	0
Total Recorded Investment	$ 6,000	$ 0