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Allowance for Loan Losses and Recorded Investment in Loans, Evaluated for Impairment Excluding PCI Loans, by Loan Class (Detail) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | $ 16,794 | $ 22,718
Allowance for Loans Individually Evaluated | 2,803 | 2,371
Loans Collectively Evaluated for Impairment | 1,787,794 | 1,641,181
Allowance for Loans Collectively Evaluated | 16,818 | 17,808
Commercial Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 11,232 | 15,495
Allowance for Loans Individually Evaluated | 1,950 | 1,692
Loans Collectively Evaluated for Impairment | 1,041,428 | 895,984
Allowance for Loans Collectively Evaluated | 11,036 | 11,440
Commercial Loans | Construction Development And Other Land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 53,181 | 53,437
Allowance for Loans Collectively Evaluated | 813 | 1,119
Commercial Loans | Commercial and Industrial Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 91,274 | 89,885
Allowance for Loans Collectively Evaluated | 473 | 504
Commercial Loans | Multi-family Residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 292 |
Loans Collectively Evaluated for Impairment | 127,176 | 95,486
Allowance for Loans Collectively Evaluated | 1,259 | 1,535
Commercial Loans | Single-family Non-owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 1,131 | 1,401
Allowance for Loans Individually Evaluated | 107 | 124
Loans Collectively Evaluated for Impairment | 141,624 | 147,209
Allowance for Loans Collectively Evaluated | 2,553 | 3,245
Commercial Loans | Non-farm, Non-residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 9,809 | 14,094
Allowance for Loans Individually Evaluated | 1,843 | 1,568
Loans Collectively Evaluated for Impairment | 589,975 | 478,839
Allowance for Loans Collectively Evaluated | 5,706 | 4,825
Commercial Loans | Agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 5,812 | 2,945
Allowance for Loans Collectively Evaluated | 41 | 22
Commercial Loans | Farmland Loan |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 32,386 | 28,183
Allowance for Loans Collectively Evaluated | 191 | 190
Consumer Real Estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 5,562 | 7,223
Allowance for Loans Individually Evaluated | 853 | 679
Loans Collectively Evaluated for Impairment | 666,894 | 665,775
Allowance for Loans Collectively Evaluated | 5,079 | 5,678
Consumer Real Estate | Home Equity Lines |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 124,589 | 126,691
Allowance for Loans Collectively Evaluated | 967 | 1,091
Consumer Real Estate | Single Family Owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 5,220 | 6,874
Allowance for Loans Individually Evaluated | 853 | 672
Loans Collectively Evaluated for Impairment | 498,561 | 495,761
Allowance for Loans Collectively Evaluated | 3,766 | 4,297
Consumer Real Estate | Owner Occupied Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 342 | 349
Allowance for Loans Individually Evaluated |  | 7
Loans Collectively Evaluated for Impairment | 43,744 | 43,323
Allowance for Loans Collectively Evaluated | 346 | 290
Consumer and Other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 79,472 | 79,422
Allowance for Loans Collectively Evaluated | 703 | 690
Consumer and Other | Consumer Loan |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 76,443 | 72,084
Allowance for Loans Collectively Evaluated | 703 | 690
Consumer and Other | Other Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | $ 3,029 | $ 7,338

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + 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=66008989&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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=66008989&loc=SL6953423-111524 + Details
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