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Allowance for Loan Losses - Composition of Allowance for Loans Losses, by Class (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | $ 2,308 | $ 1,812 | $ 974 |
Allowance for Loans Evaluated Collectively for Impairment | 8,924 | 8,917 | 9,164 |
Total Allowance for Loan Losses | 11,232 | 10,729 | 10,138 | $ 9,916
Commercial | Real Estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 260 | 224 | 505 |
Allowance for Loans Evaluated Collectively for Impairment | 3,307 | 3,648 | 3,483 |
Total Allowance for Loan Losses | 3,567 | 3,872 | 3,988 | 3,120
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 0 | 0 | 100 |
Allowance for Loans Evaluated Collectively for Impairment | 255 | 434 | 296 |
Total Allowance for Loan Losses | 255 | 434 | 396 | 580
Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 1,696 | 1,309 | 39 |
Allowance for Loans Evaluated Collectively for Impairment | 1,845 | 2,049 | 1,741 |
Total Allowance for Loan Losses | 3,541 | 3,358 | 1,780 | 1,452
Municipal |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 0 | 0 | 0 |
Allowance for Loans Evaluated Collectively for Impairment | 24 | 20 | 18 |
Total Allowance for Loan Losses | 24 | 20 | 18 | 17
Residential | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 0 | 0 | 0 |
Allowance for Loans Evaluated Collectively for Impairment | 34 | 36 | 44 |
Total Allowance for Loan Losses | 34 | 36 | 44 | 24
Residential | Term |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 335 | 255 | 304 |
Allowance for Loans Evaluated Collectively for Impairment | 900 | 875 | 984 |
Total Allowance for Loan Losses | 1,235 | 1,130 | 1,288 | 1,391
Home Equity LIne of Credit |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 17 | 24 | 26 |
Allowance for Loans Evaluated Collectively for Impairment | 713 | 668 | 781 |
Total Allowance for Loan Losses | 730 | 692 | 807 | 893
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 0 | 0 | 0 |
Allowance for Loans Evaluated Collectively for Impairment | 630 | 545 | 559 |
Total Allowance for Loan Losses | 630 | 545 | 559 | 566
Unallocated |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Allowance for Loans Evaluated Individually for Impairment | 0 | 0 | 0 |
Allowance for Loans Evaluated Collectively for Impairment | 1,216 | 642 | 1,258 |
Total Allowance for Loan Losses | $ 1,216 | $ 642 | $ 1,258 | $ 1,873

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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 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://fasb.org/us-gaap/role/ref/legacyRef -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 2: 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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: 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 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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