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Derivative Financial Instruments - Fair Value of Derivative Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative $ 1,339 $ 159
Total Liability Derivative 4,065 2,795
Derivatives Designated as Hedging Instruments [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative 698 (53)
Total Liability Derivative 4,065 2,773
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
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 698 (53)
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 3,367 2,826
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 698 (60)
Derivatives Not Designated as Hedging Instruments [Member]
    
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]    
Total Asset Derivative 641 212
Total Liability Derivative 0 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 0 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 $ 641 $ 212