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Loans and Allowance for Credit Losses (Allowance for Credit Losses on Loans Receivable with Impairment) (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 1,047,247 | $ 871,525
Allowance for credit losses allocated to: |  |
Loans and leases receivable, allowance, total | 9,295 | 8,726
Commercial and Residential Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans individually evaluated for impairment | 6,986 | 8,007
Loans collectively evaluated for impairment | 99,631 | 75,995
Total loans | 106,617 | 84,002
Allowance for credit losses allocated to: |  |
Loans individually evaluated for impairment | 589 | 1,639
Loans collectively evaluated for impairment | 1,652 | 1,148
Loans and leases receivable, allowance, total | 2,241 | 2,787
Residential Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans individually evaluated for impairment | 7,190 | 7,778
Loans collectively evaluated for impairment | 380,532 | 317,990
Total loans | 387,722 | 325,768
Allowance for credit losses allocated to: |  |
Loans individually evaluated for impairment | 251 | 317
Loans collectively evaluated for impairment | 1,792 | 1,636
Loans and leases receivable, allowance, total | 2,043 | 1,953
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans individually evaluated for impairment | 5,265 | 6,088
Loans collectively evaluated for impairment | 449,361 | 376,593
Total loans | 454,626 | 382,681
Allowance for credit losses allocated to: |  |
Loans individually evaluated for impairment | 35 | 185
Loans collectively evaluated for impairment | 2,849 | 2,425
Loans and leases receivable, allowance, total | 2,884 | 2,610
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans individually evaluated for impairment | 341 |
Loans collectively evaluated for impairment | 91,458 | 72,435
Total loans | 91,799 | 72,435
Allowance for credit losses allocated to: |  |
Loans collectively evaluated for impairment | 1,804 | 1,145
Loans and leases receivable, allowance, total | 1,804 | 1,145
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans individually evaluated for impairment |  | 99
Loans collectively evaluated for impairment | 6,483 | 6,540
Total loans | 6,483 | 6,639
Allowance for credit losses allocated to: |  |
Loans collectively evaluated for impairment | 323 | 231
Loans and leases receivable, allowance, total | 323 | 231
Unallocated Financing Receivables [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans individually evaluated for impairment | 19,782 | 21,972
Loans collectively evaluated for impairment | 1,027,465 | 849,553
Total loans | 1,047,247 | 871,525
Allowance for credit losses allocated to: |  |
Loans individually evaluated for impairment | 875 | 2,141
Loans collectively evaluated for impairment | 8,420 | 6,585
Loans and leases receivable, allowance, total | $ 9,295 | $ 8,726

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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 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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