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Loans Receivable and Allowance for Loan Losses (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Jul. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Loans with Specific Evidence of Deterioration in Credit Quality, Outstanding Balance	$ 1,743,000		$ 1,821,000
Acquired Loans with Specific Evidence of Deterioration in Credit Quality, Carrying Amount	1,356,000		1,386,000	$ 1,368,000
Real Estate Acquired Through Foreclosure	4,703,000		5,302,000
Loans and Leases Receivable, Gross	719,649,000		714,105,000
Impaired Financing Receivable, Recorded Investment	2,601,000		2,624,000
Impaired Financing Receivable, Related Allowance	0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,601,000		2,624,000
Write downs	184,000	$ 136,000
Gross Realized Losses on Loans	0
Proceeds from Sale of Mortgage Loans Held-for-sale	0	1,013,000
Commercial Rentals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 79,200,000
Commercial Rentals [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage	11.00%
Hospitality Lodging Industry [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gross	$ 50,200,000
Hospitality Lodging Industry [Member] | Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage	7.00%
Troubled Debt Restructured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired Financing Receivable, Related Allowance	$ 0		0
Residential Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Loans with Specific Evidence of Deterioration in Credit Quality, Carrying Amount	826,000		821,000
Real Estate Acquired Through Foreclosure	135,000
Mortgage Loans in Process of Foreclosure, Amount	801,000
Loans and Leases Receivable, Gross	236,676,000		237,177,000
Impaired Financing Receivable, Recorded Investment	83,000		23,000
Impaired Financing Receivable, Related Allowance	0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	83,000		23,000
Write downs	39,000	0
Gross Realized Gains on Loans	30,000
Gross Realized Losses on Loans	0
Proceeds from Sale of Mortgage Loans Held-for-sale	1,000,000
Commercial Real Estate Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Loans with Specific Evidence of Deterioration in Credit Quality, Carrying Amount	530,000		565,000
Loans and Leases Receivable, Gross	327,067,000		320,187,000
Impaired Financing Receivable, Recorded Investment	2,518,000		2,601,000
Impaired Financing Receivable, Related Allowance	0		0
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	2,518,000		$ 2,601,000
Write downs	85,000	$ 129,000
Delaware Bancshares, Inc. Acquisition [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired Loans with Specific Evidence of Deterioration in Credit Quality, Outstanding Balance	1,397,000
Assets, Fair Value Adjustment	$ 499,000

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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