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Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Fair Value on Nonrecurring Basis - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Impaired Loans | Non Covered Loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Fair value | $ 4,078 | $ 9,164
OREO | Non Covered Loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Fair value | 5,109 | 4,819
OREO | Covered Loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Fair value | 265 | 4,034
Level 3 | Impaired Loans | Non Covered Loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Fair value | 4,078 | 9,164
Level 3 | OREO | Non Covered Loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Fair value | 5,109 | 4,819
Level 3 | OREO | Covered Loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Fair value | $ 265 | $ 4,034

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + 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 (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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