Investment Securities (Unrealized Gain (Loss) on Investments) (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Available-for-sale securities, Amortized Cost	$ 96,198,000	$ 138,048,000
Available-for-sale securities, Unrealized Gains	14,000	142,000
Available-for-sale securities, Unrealized Losses	2,747,000	4,565,000
Available for sale Securities, Fair Value	93,465,000	133,625,000
Held-to-maturity securities, Amortized Cost	101,356,000	0	$ 0
Held-to-maturity securities, Unrealized Gains	41,000
Held-to-maturity securities, Unrealized Losses	914,000
Held-to-maturity securities, Fair Value	100,483,000	0
Available-for-sale securities and Held-to-maturity securities, Amortized Cost	197,554,000
Available-for-sale securities and Held-to-maturity securities, Unrealized Gains	55,000
Available-for-sale securities and Held-to-maturity securities, Unrealized Losses	3,661,000
Available-for-sale securities and Held-to-maturity securities, Fair Value	193,948,000
U.S. Treasury and U.S. government agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Amortized Cost	40,125,000	48,520,000
Available-for-sale securities, Unrealized Gains		34,000
Available-for-sale securities, Unrealized Losses	1,395,000	1,542,000
Available for sale Securities, Fair Value	38,730,000	47,012,000
Held-to-maturity securities, Amortized Cost	10,984,000
Held-to-maturity securities, Unrealized Losses	90,000
Held-to-maturity securities, Fair Value	10,894,000
Mortgage-backed U.S. Government Agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Amortized Cost	26,398,000	26,181,000
Available-for-sale securities, Unrealized Gains	2,000	17,000
Available-for-sale securities, Unrealized Losses	569,000	579,000
Available for sale Securities, Fair Value	25,831,000	25,619,000
Held-to-maturity securities, Amortized Cost	53,472,000
Held-to-maturity securities, Unrealized Losses	523,000
Held-to-maturity securities, Fair Value	52,949,000
State and political subdivision obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Amortized Cost	27,775,000	61,079,000
Available-for-sale securities, Unrealized Gains	7,000	91,000
Available-for-sale securities, Unrealized Losses	739,000	2,332,000
Available for sale Securities, Fair Value	27,043,000	58,838,000
Held-to-maturity securities, Amortized Cost	36,900,000
Held-to-maturity securities, Unrealized Gains	41,000
Held-to-maturity securities, Unrealized Losses	301,000
Held-to-maturity securities, Fair Value	36,640,000
Corporate debt securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Amortized Cost	1,000,000	1,000,000
Available-for-sale securities, Unrealized Gains	5,000
Available for sale Securities, Fair Value	1,005,000	1,000,000
Equity Securities [Member]
Schedule of Investments [Line Items]
Available-for-sale securities, Amortized Cost	900,000	1,268,000
Available-for-sale securities, Unrealized Losses	44,000	112,000
Available for sale Securities, Fair Value	$ 856,000	$ 1,156,000