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Loans and Allowance for Loan Losses - Summary of Aging Recorded Investment Past-due Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | $ 2,432 | $ 3,920
Loans Not Past Due | 1,194,090 | 1,106,526
Total | 1,196,522 | 1,110,446
Real Estate | Construction and Land Development |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Loans Not Past Due | 94,297 | 89,409
Total | 94,297 | 89,409
Real Estate | Commercial Real Estate |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Loans Not Past Due | 491,086 | 501,798
Total | 491,086 | 501,798
Real Estate | Single-family Residential Mortgages |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 531 |
Loans Not Past Due | 236,636 | 156,428
Total | 237,167 | 156,428
Commercial | Other |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 213 | 343
Loans Not Past Due | 225,754 | 203,500
Total | 225,967 | 203,843
Commercial | SBA |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 1,688 | 3,577
Loans Not Past Due | 146,317 | 155,391
Total | 148,005 | 158,968
30-59 Days Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 998 | 343
30-59 Days Past Due | Real Estate | Single-family Residential Mortgages |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 531 |
30-59 Days Past Due | Commercial | Other |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 213 | 343
30-59 Days Past Due | Commercial | SBA |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 254 |
60-89 Days Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | 1,434 |
60-89 Days Past Due | Commercial | SBA |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due | $ 1,434 |
Greater Than 89 Days Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due |  | 3,577
Greater Than 89 Days Past Due | Commercial | SBA |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Past Due |  | $ 3,577

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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + 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=82891408&loc=d3e4428-111522 + Details
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