Loans and Allowance for Credit Losses (Allowance for Credit Losses on Loans Receivable with Impairment) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	$ 23,188	$ 25,318
Loans collectively evaluated for impairment	1,188,528	1,170,037
Total loans	1,211,716	1,195,355
Allowance for credit losses allocated to:
Loans individually evaluated for impairment	812	761
Loans collectively evaluated for impairment	9,606	9,582
Loans and Leases Receivable, Allowance, Total	10,418	10,343
Commercial and Residential Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	2,814	2,893
Loans collectively evaluated for impairment	139,257	124,679
Total loans	142,071	127,572
Allowance for credit losses allocated to:
Loans individually evaluated for impairment	279	320
Loans collectively evaluated for impairment	2,378	2,342
Loans and Leases Receivable, Allowance, Total	2,657	2,662
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	7,218	8,553
Loans collectively evaluated for impairment	419,805	421,007
Total loans	427,023	429,560
Allowance for credit losses allocated to:
Loans individually evaluated for impairment	427	301
Loans collectively evaluated for impairment	2,006	2,052
Loans and Leases Receivable, Allowance, Total	2,433	2,353
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	12,841	13,532
Loans collectively evaluated for impairment	516,388	509,895
Total loans	529,229	523,427
Allowance for credit losses allocated to:
Loans individually evaluated for impairment	94	104
Loans collectively evaluated for impairment	2,963	2,973
Loans and Leases Receivable, Allowance, Total	3,057	3,077
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment	315	340
Loans collectively evaluated for impairment	105,857	107,182
Total loans	106,172	107,522
Allowance for credit losses allocated to:
Loans individually evaluated for impairment	12	36
Loans collectively evaluated for impairment	1,997	1,913
Loans and Leases Receivable, Allowance, Total	2,009	1,949
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment	7,221	7,274
Total loans	7,221	7,274
Allowance for credit losses allocated to:
Loans collectively evaluated for impairment	262	302
Loans and Leases Receivable, Allowance, Total	$ 262	$ 302

Loans and leases receivable allowances abstract

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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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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