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Derivatives - Credit Value Adjustment Recorded Related to Notional Amount of Derivatives Outstanding (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Derivative [Line Items]    
Derivative, Fair Value, Net $ (19) $ (77)
Interest Rate Swap [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 271,391 274,718
Interest Rate Cap [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 7,263 7,500
Credit Default Swap, Buying Protection [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount 81,704 82,197
Credit Default Swap, Selling Protection [Member]
    
Derivative [Line Items]    
Derivative, Notional Amount $ (19,045) $ (19,161)