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Loans and Allowance for Loan Losses - Schedule of Loan Portfolio by Reporting Segment and Portfolio Segment (Detail) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | $ 260,133 | $ 274,317 |  |
Less: Unearned interest, fees and deferred cost | 10,132 | 8,633 |  |
Allowance for loan losses | 5,008 | 6,168 |  |
Net loans | 244,993 | 259,516 | $ 272,086 |
FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 167,662 | 191,175 |  |
Less: Unearned interest, fees and deferred cost | 191 | 189 |  |
Allowance for loan losses | 2,449 | 3,486 |  | $ 6,272
Net loans | 165,022 | 187,500 |  |
ALC [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 92,471 | 83,142 |  |
Less: Unearned interest, fees and deferred cost | 9,941 | 8,444 |  |
Allowance for loan losses | 2,559 | 2,682 |  | 3,124
Net loans | 79,971 | 72,016 |  |
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 12,363 | 10,431 |  |
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 12,363 | 10,431 |  |
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 49,693 | 52,104 |  |
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 30,564 | 30,795 |  |
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | ALC [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 19,129 | 21,309 |  |
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 17,163 | 20,403 |  |
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 17,163 | 20,403 |  |
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 81,621 | 104,883 |  |
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 81,621 | 104,883 |  |
Real Estate [Member] | Other Real Estate Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 57 | 58 |  |
Real Estate [Member] | Other Real Estate Loans [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 57 | 58 |  |
Commercial and Industrial Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 18,198 | 16,838 |  |
Commercial and Industrial Loans [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 18,198 | 16,838 |  |
Allowance for loan losses | 117 | 141 |  | 592
Consumer Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 80,252 | 69,021 |  |
Consumer Loans [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 6,910 | 7,188 |  |
Allowance for loan losses | 42 | 114 |  | 180
Consumer Loans [Member] | ALC [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 73,342 | 61,833 |  |
Allowance for loan losses | 2,276 | 2,336 |  | 2,667
Other Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | 786 | 579 |  |
Other Loans [Member] | FUSB [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Total loans | $ 786 | $ 579 |  |
Allowance for loan losses |  |  |  | $ 13

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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=49124121&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=49124121&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 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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