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Loans Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward] |  |  |
Allowance for Credit Losses, Beginning Balance | $ 16,038 | $ 15,570 | $ 14,434
Charge-offs | (1,270) | (1,106) | (1,021)
Recoveries | 211 | 227 | 309
Provision | 2,033 | 1,347 | 1,848
Allowance for Credit Losses, Ending Balance | 17,012 | 16,038 | 15,570
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |
Allowance for Loan Losses - Individually Evaluated for Impairment | 0 | 0 |
Allowance for Loan Losses - Collectively Evaluated for Impairment | 17,012 | 16,038 |
Ending Loan Balance - Individually Evaluated for Impairment | 2,079 | 3,286 |
Ending Loan Balance - Collectively Evaluated for Impairment | 1,751,189 | 1,570,666 |
Commercial [Member] |  |  |
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward] |  |  |
Allowance for Credit Losses, Beginning Balance | 1,827 | 2,100 | 1,886
Charge-offs | (97) | (62) | (212)
Recoveries | 23 | 34 | 86
Provision | (736) | (245) | 340
Allowance for Credit Losses, Ending Balance | 1,017 | 1,827 | 2,100
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |
Allowance for Loan Losses - Individually Evaluated for Impairment | 0 | 0 |
Allowance for Loan Losses - Collectively Evaluated for Impairment | 1,017 | 1,827 |
Ending Loan Balance - Individually Evaluated for Impairment | 0 | 155 |
Ending Loan Balance - Collectively Evaluated for Impairment | 105,155 | 102,432 |
Commercial Real Estate [Member] |  |  |
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward] |  |  |
Allowance for Credit Losses, Beginning Balance | 4,520 | 4,128 | 3,962
Charge-offs | (195) | (7) | 0
Recoveries | 0 | 0 | 0
Provision | 1,352 | 399 | 166
Allowance for Credit Losses, Ending Balance | 5,677 | 4,520 | 4,128
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |
Allowance for Loan Losses - Individually Evaluated for Impairment | 0 | 0 |
Allowance for Loan Losses - Collectively Evaluated for Impairment | 5,677 | 4,520 |
Ending Loan Balance - Individually Evaluated for Impairment | 890 | 2,372 |
Ending Loan Balance - Collectively Evaluated for Impairment | 430,756 | 382,567 |
Other Consumer [Member] |  |  |
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward] |  |  |
Allowance for Credit Losses, Beginning Balance | 5,554 | 5,210 | 4,478
Charge-offs | (871) | (711) | (718)
Recoveries | 182 | 193 | 223
Provision | 1,255 | 862 | 1,227
Allowance for Credit Losses, Ending Balance | 6,120 | 5,554 | 5,210
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |
Allowance for Loan Losses - Individually Evaluated for Impairment | 0 | 0 |
Allowance for Loan Losses - Collectively Evaluated for Impairment | 6,120 | 5,554 |
Ending Loan Balance - Individually Evaluated for Impairment | 91 | 114 |
Ending Loan Balance - Collectively Evaluated for Impairment | 537,270 | 464,409 |
Residential Portfolio Segment [Member] |  |  |
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward] |  |  |
Allowance for Credit Losses, Beginning Balance | 3,790 | 3,369 | 3,026
Charge-offs | (107) | (326) | (91)
Recoveries | 6 | 0 | 0
Provision | 509 | 747 | 434
Allowance for Credit Losses, Ending Balance | 4,198 | 3,790 | 3,369
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |
Allowance for Loan Losses - Individually Evaluated for Impairment | 0 | 0 |
Allowance for Loan Losses - Collectively Evaluated for Impairment | 4,198 | 3,790 |
Ending Loan Balance - Individually Evaluated for Impairment | 1,098 | 645 |
Ending Loan Balance - Collectively Evaluated for Impairment | 678,008 | 621,258 |
Unallocated [Member] |  |  |
Rollfoward of the Allowance for Loan Losses for the Quarterly Report [Roll Forward] |  |  |
Allowance for Credit Losses, Beginning Balance | 347 | 763 | 1,082
Charge-offs | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Provision | (347) | (416) | (319)
Allowance for Credit Losses, Ending Balance | 0 | 347 | $ 763
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] |  |  |
Allowance for Loan Losses - Individually Evaluated for Impairment | 0 | 0 |
Allowance for Loan Losses - Collectively Evaluated for Impairment | 0 | 347 |
Ending Loan Balance - Individually Evaluated for Impairment | 0 | 0 |
Ending Loan Balance - Collectively Evaluated for Impairment | $ 0 | $ 0 |

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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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=66008989&loc=SL6953423-111524 + Details
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