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Short-term borrowings - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Peoples Bank [Member]
 
Short-term Debt [Line Items]  
Maximum borrowing capacity $ 214,756
Outstanding amount in long-term borrowings $ 36,743
Repurchase Agreements [Member] | FHLB Advances [Member]
 
Short-term Debt [Line Items]  
Short term debt, Description Securities sold under agreements to repurchase and FHLB advances generally represent overnight or less than 30-day borrowings.