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Loans and Allowance for Loan Losses - Summary of Risk Category of Loans by Class of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | $ 1,196,522 | $ 1,110,446
Real Estate | Construction and Land Development |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 94,297 | 89,409
Real Estate | Commercial Real Estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 491,086 | 501,798
Real Estate | Single-family Residential Mortgages |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 237,167 | 156,428
Commercial | Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 225,967 | 203,843
Commercial | SBA |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 148,005 | 158,968
Pass |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 1,141,529 | 1,044,172
Pass | Real Estate | Construction and Land Development |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 94,004 | 87,174
Pass | Real Estate | Commercial Real Estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 444,108 | 475,499
Pass | Real Estate | Single-family Residential Mortgages |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 237,167 | 136,206
Pass | Commercial | Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 222,743 | 194,227
Pass | Commercial | SBA |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 143,507 | 151,066
Special Mention |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 7,296 | 22,378
Special Mention | Real Estate | Construction and Land Development |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans |  | 1,932
Special Mention | Real Estate | Commercial Real Estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 4,517 | 4,562
Special Mention | Real Estate | Single-family Residential Mortgages |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans |  | 13,950
Special Mention | Commercial | Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 960 |
Special Mention | Commercial | SBA |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 1,819 | 1,934
Substandard |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 43,747 | 37,763
Substandard | Real Estate | Commercial Real Estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 40,174 | 19,484
Substandard | Real Estate | Single-family Residential Mortgages |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans |  | 6,272
Substandard | Commercial | Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 971 | 9,616
Substandard | Commercial | SBA |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 2,602 | 2,391
Impaired |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 3,950 | 6,133
Impaired | Real Estate | Construction and Land Development |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 293 | 303
Impaired | Real Estate | Commercial Real Estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 2,287 | 2,253
Impaired | Commercial | Other |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | 1,293 |
Impaired | Commercial | SBA |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total loans | $ 77 | $ 3,577

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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=82891408&loc=d3e4428-111522 + Details
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