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Covered Assets and FDIC Loss Sharing Asset - Schedule Activity of Loans Held-for-Sale (Detail) (Covered Loans Held-for-Sale Activity [Member], USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Covered Loans Held-for-Sale Activity [Member]
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance, beginning of period    $ 5,664
Sales of other loans    (3,745)
Write-down of loans held for sale    (1,219)
Payment on other loans    (700)
Balance, end of period