Loans and Allowance for Credit Losses (Financing Receivable Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	$ 1,211,716	$ 1,195,355
Pass Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	990,777	967,331
Pass Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	185,618	194,540
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	12,888	8,926
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	22,433	24,558
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	142,071	127,572
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	108,606	93,977
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	28,496	30,735
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	2,186
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	2,783	2,860
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	427,023	429,560
Residential Portfolio Segment [Member] | Pass Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	386,816	386,553
Residential Portfolio Segment [Member] | Pass Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	31,783	33,739
Residential Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	4,245	3,769
Residential Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	4,179	5,499
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	529,229	523,427
Commercial Real Estate Portfolio Segment [Member] | Pass Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	399,958	389,219
Commercial Real Estate Portfolio Segment [Member] | Pass Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	108,186	113,873
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	5,967	4,515
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	15,118	15,820
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	106,172	107,522
Commercial Portfolio Segment [Member] | Pass Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	88,627	90,777
Commercial Portfolio Segment [Member] | Pass Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	16,705	15,727
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	490	642
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	350	376
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	7,221	7,274
Consumer Portfolio Segment [Member] | Pass Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	6,770	6,805
Consumer Portfolio Segment [Member] | Pass Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	448	466
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan Risk Rating	$ 3	$ 3