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Borrowed Funds - Schedule of Repayment of Long-Term Borrowings for Securities Sold Under Agreements to Repurchase (Detail) (Long-term borrowings [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Long-term borrowings [Member]
   
Debt Instrument [Line Items]    
2015 $ 125,000  
2016 92,500  
2017 220,000  
2018 100,000  
Thereafter 50,000  
Securities sold under agreements to repurchase $ 587,500 $ 587,500