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Loans and Allowance for Loan Losses (Details 10) - USD ($) $ in Thousands | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016
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Allowance for loan losses and recorded investment in loans by impairment methodology |  |  |  |  |  |
Allowance for loan losses, Individually evaluated | $ 3,470 |  | $ 3,677 |  |  |
Recorded investment in loans, Individually evaluated | 15,118 |  | 12,446 |  |  |
Allowance for loan losses, Collectively evaluated | 12,630 |  | 11,846 |  |  |
Recorded investment in loans, Collectively evaluated | 1,518,329 |  | 1,374,624 |  |  |
Allowance for loan losses, Total | 16,100 | $ 15,852 | 15,523 | $ 15,444 | $ 15,287 | $ 14,855
Recorded investment in loans, Total | 1,533,447 |  | 1,387,070 |  |  |
Commercial [Member] |  |  |  |  |  |
Allowance for loan losses and recorded investment in loans by impairment methodology |  |  |  |  |  |
Allowance for loan losses, Individually evaluated | 2,130 |  | 1,990 |  |  |
Recorded investment in loans, Individually evaluated | 9,970 |  | 8,664 |  |  |
Allowance for loan losses, Collectively evaluated | 8,543 |  | 7,947 |  |  |
Recorded investment in loans, Collectively evaluated | 1,015,565 |  | 898,289 |  |  |
Allowance for loan losses, Total | 10,673 |  | 9,937 |  |  |
Recorded investment in loans, Total | 1,025,535 |  | 906,953 |  |  |
Consumer [Member] |  |  |  |  |  |
Allowance for loan losses and recorded investment in loans by impairment methodology |  |  |  |  |  |
Allowance for loan losses, Individually evaluated | 1,340 |  | 1,687 |  |  |
Recorded investment in loans, Individually evaluated | 5,148 |  | 3,782 |  |  |
Allowance for loan losses, Collectively evaluated | 4,087 |  | 3,899 |  |  |
Recorded investment in loans, Collectively evaluated | 502,764 |  | 476,335 |  |  |
Allowance for loan losses, Total | 5,427 |  | 5,586 |  |  |
Recorded investment in loans, Total | $ 507,912 |  | $ 480,117 |  |  |

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + 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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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 before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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