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Allowance For Loan Loss Additional Information (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Financing Receivable Allowance For Credit Loss Additional Information [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | $ 4,715 | $ 4,612
Financing Receivable, Collectively Evaluated for Impairment | 451,435 | 429,376
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 42 | 31
Financing Receivable, Individually Evaluated for Impairment | 2,742 | 2,130
Allowance for loan losses | 4,757 | 4,643
Loans and Leases Receivable, Gross, Carrying Amount | 454,177 | 431,506
Commercial and Industrial Loans [Member] |  |
Financing Receivable Allowance For Credit Loss Additional Information [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 622 | 540
Financing Receivable, Collectively Evaluated for Impairment | 59,055 | 49,835
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 31 | 0
Financing Receivable, Individually Evaluated for Impairment | 31 | 15
Allowance for loan losses | 653 | 540
Loans and Leases Receivable, Gross, Carrying Amount | 59,086 | 49,850
Construction And Land Development Loans [Member] |  |
Financing Receivable Allowance For Credit Loss Additional Information [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 734 | 812
Financing Receivable, Collectively Evaluated for Impairment | 39,607 | 41,618
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0
Financing Receivable, Individually Evaluated for Impairment | 0 | 32
Allowance for loan losses | 734 | 812
Loans and Leases Receivable, Gross, Carrying Amount | 39,607 | 41,650
Commercial Real Estate Loans, Total [Member] |  |
Financing Receivable Allowance For Credit Loss Additional Information [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 2,115 | 2,040
Financing Receivable, Collectively Evaluated for Impairment | 236,322 | 218,356
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 11 | 31
Financing Receivable, Individually Evaluated for Impairment | 2,711 | 2,083
Allowance for loan losses | 2,126 | 2,071
Loans and Leases Receivable, Gross, Carrying Amount | 239,033 | 220,439
Residential Real Estate Loans, Total [Member] |  |
Financing Receivable Allowance For Credit Loss Additional Information [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 1,071 | 1,107
Financing Receivable, Collectively Evaluated for Impairment | 106,863 | 110,855
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0
Financing Receivable, Individually Evaluated for Impairment | 0 | 0
Allowance for loan losses | 1,071 | 1,107
Loans and Leases Receivable, Gross, Carrying Amount | 106,863 | 110,855
Consumer Installment and Revolving Loans [Member] |  |
Financing Receivable Allowance For Credit Loss Additional Information [Line Items] |  |
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment | 173 | 113
Financing Receivable, Collectively Evaluated for Impairment | 9,588 | 8,712
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 0
Financing Receivable, Individually Evaluated for Impairment | 0 | 0
Allowance for loan losses | 173 | 113
Loans and Leases Receivable, Gross, Carrying Amount | $ 9,588 | $ 8,712

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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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- 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=66008989&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=66008989&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=66008989&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=66008989&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=66008989&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=6379141&loc=d3e15032-111544 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65884687&loc=d3e4428-111522 + Details
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