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Average Recorded Investment and Interest Income Recognized on Impaired Loans Excluding Purchased Credit Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | $ 9,359 | $ 10,558
Impaired loans with a related allowance, Average Recorded Investment | 20,340 | 15,454
Total impaired loans, Average Recorded Investment | 29,699 | 26,012
Impaired loans with no related allowance, Interest Income Recognized | 113 | 451
Impaired loans with a related allowance, Interest Income Recognized | 130 | 193
Total impaired loans, Interest Income Recognized | 243 | 644
Commercial Loans | Construction Development And Other Land |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment |  | 2,195
Impaired loans with a related allowance, Average Recorded Investment |  | 2,670
Impaired loans with no related allowance, Interest Income Recognized |  | 43
Impaired loans with a related allowance, Interest Income Recognized |  | 117
Commercial Loans | Commercial and Industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | 292 | 599
Impaired loans with a related allowance, Average Recorded Investment | 5,157 | 3,217
Impaired loans with no related allowance, Interest Income Recognized | 12 | 11
Impaired loans with a related allowance, Interest Income Recognized | 47 |
Commercial Loans | Multi-family Residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment |  | 35
Impaired loans with a related allowance, Average Recorded Investment | 5,603 | 376
Impaired loans with no related allowance, Interest Income Recognized |  | 2
Impaired loans with a related allowance, Interest Income Recognized | 22 | 7
Commercial Loans | Single-family Non-owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | 420 | 841
Impaired loans with a related allowance, Average Recorded Investment | 372 | 1,728
Impaired loans with no related allowance, Interest Income Recognized | 1 | 79
Impaired loans with a related allowance, Interest Income Recognized | 1 | 3
Commercial Loans | Non-farm, Non-residential |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | 5,918 | 5,955
Impaired loans with a related allowance, Average Recorded Investment | 4,399 | 2,756
Impaired loans with no related allowance, Interest Income Recognized | 36 | 212
Impaired loans with a related allowance, Interest Income Recognized | 25 | 26
Commercial Loans | Farmland Loan |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | 363 | 88
Impaired loans with no related allowance, Interest Income Recognized | 11 | 9
Consumer Real Estate | Home Equity Lines |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | 265 | 298
Impaired loans with a related allowance, Average Recorded Investment | 229 | 222
Impaired loans with no related allowance, Interest Income Recognized | 2 | 25
Impaired loans with a related allowance, Interest Income Recognized | 1 | 3
Consumer Real Estate | Single Family Owner Occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Impaired loans with no related allowance, Average Recorded Investment | 2,101 | 547
Impaired loans with a related allowance, Average Recorded Investment | 4,580 | 4,485
Impaired loans with no related allowance, Interest Income Recognized | 51 | 70
Impaired loans with a related allowance, Interest Income Recognized | $ 34 | $ 37

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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