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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 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | $ 22,718 | $ 16,048
Allowance for Loans Individually Evaluated | 2,371 | 1,482
Loans Collectively Evaluated for Impairment | 1,641,181 | 1,611,085
Allowance for Loans Collectively Evaluated | 17,808 | 18,687
Commercial Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 15,495 | 10,310
Allowance for Loans Individually Evaluated | 1,692 | 1,045
Loans Collectively Evaluated for Impairment | 895,984 | 878,292
Allowance for Loans Collectively Evaluated | 11,440 | 11,965
Commercial Loans | Construction Development And Other Land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 53,437 | 51,608
Allowance for Loans Collectively Evaluated | 1,119 | 1,151
Commercial Loans | Commercial and Industrial Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 89,885 | 85,353
Allowance for Loans Collectively Evaluated | 504 | 690
Commercial Loans | Multi-family Residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 95,486 | 98,880
Allowance for Loans Collectively Evaluated | 1,535 | 1,917
Commercial Loans | Single-family Non-owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 1,401 | 833
Allowance for Loans Individually Evaluated | 124 | 45
Loans Collectively Evaluated for Impairment | 147,209 | 135,223
Allowance for Loans Collectively Evaluated | 3,245 | 3,183
Commercial Loans | Non-farm, Non-residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 14,094 | 9,477
Allowance for Loans Individually Evaluated | 1,568 | 1,000
Loans Collectively Evaluated for Impairment | 478,839 | 475,353
Allowance for Loans Collectively Evaluated | 4,825 | 4,805
Commercial Loans | Agricultural |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 2,945 | 1,642
Allowance for Loans Collectively Evaluated | 22 | 13
Commercial Loans | Farmland Loan |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 28,183 | 30,233
Allowance for Loans Collectively Evaluated | 190 | 206
Consumer Real Estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 7,223 | 5,738
Allowance for Loans Individually Evaluated | 679 | 437
Loans Collectively Evaluated for Impairment | 665,775 | 656,809
Allowance for Loans Collectively Evaluated | 5,678 | 6,052
Consumer Real Estate | Home Equity Lines |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 126,691 | 134,006
Allowance for Loans Collectively Evaluated | 1,091 | 1,330
Consumer Real Estate | Single Family Owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 6,874 | 5,738
Allowance for Loans Individually Evaluated | 672 | 437
Loans Collectively Evaluated for Impairment | 495,761 | 489,820
Allowance for Loans Collectively Evaluated | 4,297 | 4,498
Consumer Real Estate | Owner Occupied Construction |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Individually Evaluated for Impairment | 349 |
Allowance for Loans Individually Evaluated | 7 |
Loans Collectively Evaluated for Impairment | 43,323 | 32,983
Allowance for Loans Collectively Evaluated | 290 | 224
Consumer and Other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 79,422 | 75,984
Allowance for Loans Collectively Evaluated | 690 | 670
Consumer and Other | Consumer Loan |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | 72,084 | 69,429
Allowance for Loans Collectively Evaluated | 690 | 670
Consumer and Other | Other Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Loans Collectively Evaluated for Impairment | $ 7,338 | $ 6,555

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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=49124121&loc=SL6953423-111524 + Details
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