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Loans and Allowance for Loan Losses - Allocation of Allowance for Loan Losses by Loan Category Broken Out Between Loans Individually Evaluated for Impairment and Collectively Evaluated for Impairment (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Individually evaluated for impairment | $ 202 |  | $ 513 |  |  |
Collectively evaluated for impairment | 23,045 |  | 21,234 |  |  |
Ending balance | 23,247 | $ 22,898 | 21,747 | $ 23,734 | $ 24,431 | $ 24,460
Commercial and Industrial |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Individually evaluated for impairment | 38 |  | 135 |  |  |
Collectively evaluated for impairment | 5,402 |  | 5,174 |  |  |
Ending balance | 5,440 | 5,402 | 5,309 | 5,924 | 5,242 | 5,135
Construction |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Collectively evaluated for impairment | 5,579 |  | 4,940 |  |  |
Ending balance | 5,579 | 5,598 | 4,940 | 4,373 | 4,518 | 5,143
Residential Real Estate | 1-to-4 Family Mortgage |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Individually evaluated for impairment | 17 |  | 23 |  |  |
Collectively evaluated for impairment | 2,957 |  | 3,174 |  |  |
Ending balance | 2,974 | 2,896 | 3,197 | 3,611 | 4,280 | 4,176
Residential Real Estate | Residential Line of Credit |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Collectively evaluated for impairment | 1,445 |  | 1,613 |  |  |
Ending balance | 1,445 | 1,514 | 1,613 | 1,944 | 2,075 | 2,201
Residential Real Estate | Multi-Family Mortgage |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Collectively evaluated for impairment | 513 |  | 504 |  |  |
Ending balance | 513 | 508 | 504 | 453 | 590 | 311
Commercial Real Estate | Owner Occupied |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Individually evaluated for impairment | 85 |  | 113 |  |  |
Collectively evaluated for impairment | 3,898 |  | 3,189 |  |  |
Ending balance | 3,983 | 3,387 | 3,302 | 3,764 | 4,013 | 3,682
Commercial Real Estate | Non-Owner Occupied |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Individually evaluated for impairment | 62 |  | 242 |  |  |
Collectively evaluated for impairment | 2,390 |  | 1,777 |  |  |
Ending balance | 2,452 | 2,660 | 2,019 | 2,634 | 2,739 | 2,622
Consumer and Other |  |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |  |
Collectively evaluated for impairment | 861 |  | 863 |  |  |
Ending balance | $ 861 | $ 933 | $ 863 | $ 1,031 | $ 974 | $ 1,190

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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 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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