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Derivative Financial Instruments - Fair Value of Derivative Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative $ 159 $ 3,072
Total Liability Derivative 2,795 7,707
Derivatives Designated as Hedging Instruments [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative (53) 2,214
Total Liability Derivative 2,773 7,707
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts One [Member] | Loans [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative 7 279
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts One [Member] | Other Liabilities [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Liability Derivative (53) 2,214
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts Two [Member] | Other Liabilities [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Liability Derivative 2,826 5,493
Derivatives Designated as Hedging Instruments [Member] | Interest Rate Contracts Two [Member] | Other Assets [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative (60) 1,935
Derivatives Not Designated as Hedging Instruments [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative 212 858
Total Liability Derivative 22   
Derivatives Not Designated as Hedging Instruments [Member] | Mortgage Loan Contracts [Member] | Other Liabilities [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Liability Derivative 22   
Derivatives Not Designated as Hedging Instruments [Member] | Mortgage Loan Contracts [Member] | Other Assets [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative $ 212 $ 858