Goodwill and Other Intangibles (Schedule of Components of Goodwill and Other Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets [Line Items]
Goodwill, Gross	$ 30,922	$ 30,922
Accumulated Impairment Charges	(2,637)	(2,637)
Accumulated Amortization	(667)	(667)
Goodwill, Total	27,618	27,618
Other intangible assets, Amortizable, Gross Carrying Amount	6,459	6,459
Other intangible assets, Amortizable, Accumulated Impairment Charges	(95)	(95)
Other intangible assets, Amortizable, Accumulated Amortization	(2,536)	(2,425)
Total amortizing intangible assets	3,828	3,939
Other intangible assets, Unamortizable, Net Carrying Amount		780
Intangible Assets, Gross (Excluding Goodwill)	7,239	7,239
Intangible Assets, Net (Excluding Goodwill), Total	4,608	4,719
Employment Agreements[Member]
Goodwill and Intangible Assets [Line Items]
Other intangible assets, Amortizable, Gross Carrying Amount	440	440
Other intangible assets, Amortizable, Accumulated Amortization	(440)	(440)
Insurance Expirations [Member]
Goodwill and Intangible Assets [Line Items]
Other intangible assets, Amortizable, Gross Carrying Amount	1,270	1,270
Other intangible assets, Amortizable, Accumulated Amortization	(1,270)	(1,270)
Customer Relationships [Member]
Goodwill and Intangible Assets [Line Items]
Other intangible assets, Amortizable, Gross Carrying Amount	795	795
Other intangible assets, Amortizable, Accumulated Impairment Charges	(95)	(95)
Other intangible assets, Amortizable, Accumulated Amortization	(496)	(484)
Total amortizing intangible assets	$ 204	$ 216
Weighted Average Remaining Life (in years)	4 years 4 months 24 days	4 years 7 months 6 days
Core Deposits [Member]
Goodwill and Intangible Assets [Line Items]
Other intangible assets, Amortizable, Gross Carrying Amount	$ 3,954	$ 3,954
Other intangible assets, Amortizable, Accumulated Amortization	(330)	(231)
Total amortizing intangible assets	$ 3,624	$ 3,723
Weighted Average Remaining Life (in years)	9 years 2 months 12 days	9 years 4 months 24 days
Trade Names [Member]
Goodwill and Intangible Assets [Line Items]
Other intangible assets, Unamortizable, Net Carrying Amount	$ 780	$ 780