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Quantitative Information for Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value on Nonrecurring Basis | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Impaired Loans | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Valuation Technique | [1] | Discounted appraisals |
Unobservable Input | [2] | Appraisal adjustments |
OREO | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Valuation Technique | [1] | Discounted appraisals |
Unobservable Input | [2] | Appraisal adjustments |
OREO | Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Valuation Technique | [1] | Discounted appraisals |
Unobservable Input | [2] | Appraisal adjustments |
Minimum | Impaired Loans | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 2.00% | 1.00%
Minimum | OREO | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 10.00% | 1.00%
Minimum | OREO | Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 0.00% | 21.00%
Maximum | Impaired Loans | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 38.00% | 39.00%
Maximum | OREO | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 66.00% | 100.00%
Maximum | OREO | Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 86.00% | 65.00%
Average | Impaired Loans | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 23.00% | 21.00%
Average | OREO | Non Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 35.00% | 33.00%
Average | OREO | Covered Loans |  |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |
Weighted Average |  | 56.00% | 46.00%
[1] | Fair value is generally based on appraisals of the underlying collateral.
[2] | Appraisals may be adjusted by management for customized discounting criteria, estimated sales costs, and proprietary qualitative adjustments.

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- Definition Fair value disclosure unobservable input. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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