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Loans Modified as Troubled Debt Restructurings by Loan Class Segregated by Accrual Status (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | $ 14,862 | $ 15,088
Commercial Loans | Single-family Non-owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 956 | 1,088
Commercial Loans | Non-farm, Non-residential |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 4,632 | 4,826
Consumer Real Estate | Home Equity Lines |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 44 | 47
Consumer Real Estate | Single Family Owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 8,634 | 8,883
Consumer Real Estate | Owner Occupied Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 596 | 244
Nonaccrual |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs | [1] | 823 | 554
Nonaccrual | Commercial Loans | Single-family Non-owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs | [1] | 132 |
Nonaccrual | Commercial Loans | Non-farm, Non-residential |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs | [1] |  | 83
Nonaccrual | Consumer Real Estate | Single Family Owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs | [1] | 338 | 471
Nonaccrual | Consumer Real Estate | Owner Occupied Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs | [1] | 353 |
Accrual |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 14,039 | 14,534
Accrual | Commercial Loans | Single-family Non-owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 824 | 1,088
Accrual | Commercial Loans | Non-farm, Non-residential |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 4,632 | 4,743
Accrual | Consumer Real Estate | Home Equity Lines |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 44 | 47
Accrual | Consumer Real Estate | Single Family Owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | 8,296 | 8,412
Accrual | Consumer Real Estate | Owner Occupied Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Total TDRs |  | $ 243 | $ 244
[1] | TDRs on nonaccrual status are included in the total nonaccrual loan balance disclosed in the table above.

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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