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Loans - Analysis of the Credit Risk Profile of Each Loan Class (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total | $ 438,999 | $ 378,410
Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 33,135 | 29,475
Secured by 1-4 Family Residential [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 189,286 | 163,727
Other Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 181,447 | 151,802
Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 24,048 | 21,166
Consumer and Other Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 11,083 | 12,240
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 408,710 | 331,359
Pass [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 26,371 | 20,476
Pass [Member] | Secured by 1-4 Family Residential [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 182,595 | 152,004
Pass [Member] | Other Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 165,310 | 126,211
Pass [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 23,351 | 20,428
Pass [Member] | Consumer and Other Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 11,083 | 12,240
Special Mention [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 16,372 | 23,259
Special Mention [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 2,587 | 2,962
Special Mention [Member] | Secured by 1-4 Family Residential [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 3,376 | 5,058
Special Mention [Member] | Other Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 9,977 | 14,776
Special Mention [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 432 | 463
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 13,917 | 23,792
Substandard [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 4,177 | 6,037
Substandard [Member] | Secured by 1-4 Family Residential [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 3,315 | 6,665
Substandard [Member] | Other Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | 6,160 | 10,815
Substandard [Member] | Commercial and Industrial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total | $ 265 | $ 275

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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=28367877&loc=d3e4428-111522 + Details
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