Quantitative Information for Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value on Nonrecurring Basis
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9 Months Ended |
12 Months Ended |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Impaired Loans | Non Covered Loans |
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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| Valuation Technique |
[1] |
Discounted appraisals
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| Unobservable Input |
[2] |
Appraisal adjustments
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|
| OREO | Non Covered Loans |
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|
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| 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 |
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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| Weighted Average |
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3.00%
|
1.00%
|
| Minimum | OREO | Non Covered Loans |
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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| Weighted Average |
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0.00%
|
1.00%
|
| Minimum | OREO | Covered Loans |
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|
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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|
|
| Weighted Average |
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0.00%
|
21.00%
|
| Maximum | Impaired Loans | Non Covered Loans |
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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|
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| Weighted Average |
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47.00%
|
39.00%
|
| Maximum | OREO | Non Covered Loans |
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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|
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| Weighted Average |
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66.00%
|
100.00%
|
| Maximum | OREO | Covered Loans |
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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|
|
| Weighted Average |
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89.00%
|
65.00%
|
| Average | Impaired Loans | Non Covered Loans |
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|
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| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
|
|
|
| Weighted Average |
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31.00%
|
21.00%
|
| Average | OREO | Non Covered Loans |
|
|
|
| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
|
|
|
| Weighted Average |
|
28.00%
|
33.00%
|
| Average | OREO | Covered Loans |
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|
|
| Fair Value Inputs, Assets, Quantitative Information [Line Items] |
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|
|
| Weighted Average |
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61.00%
|
46.00%
|
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