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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

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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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 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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