Loans (Schedule of Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 494,417		$ 481,758
Less allowance for credit losses	(5,247)	$ (5,172)	(4,935)	$ (5,108)	$ (5,190)	$ (4,906)
Net loans	489,170		476,823
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	26,938		28,651
Less allowance for credit losses	(314)	(220)	(216)	(265)	(269)	(269)
Commercial Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	275,689		274,132
Less allowance for credit losses	(2,370)	(2,376)	(2,375)	(2,562)	(2,398)	(2,300)
Commercial Term [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	105,989		102,178
Less allowance for credit losses	(891)	(948)	(989)	(721)	(705)	(709)
Commercial Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	29,772		20,364
Less allowance for credit losses	(866)	(765)	(569)	(774)	(922)	(881)
Consumer: Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	50,248		51,270
Less allowance for credit losses	(191)	(188)	(195)	(190)	(224)	(189)
Consumer: Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,781		5,163
Less allowance for credit losses	$ (64)	$ (67)	$ (64)	$ (65)	$ (66)	$ (70)