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Securities (Maturities Of Debt Securities Available For Sale and Held To Maturity) (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Contractual Maturity Of Securities Available For Sale And Securities Held To Maturity [Line Items]    
Available for Sale securities, Due in one year or less, Amortized Cost $ 415  
Available for Sale securities, Due after one year through five years, Amortized Cost 1,719  
Available for Sale securities, Due after five years through ten years, Amortized Cost 5,361  
Available for Sale securities, Due after ten years, Amortized Cost 73,823  
Available for Sale securities, Amortized Cost 81,318  
Available for Sale securities, Due in one year or less, Fair Value 419  
Available for Sale securities, Due after one year through five years, Fair Value 1,704  
Available for Sale securities, Due after five years through ten years, Fair Value 5,629  
Available for Sale securities, Due after ten years, Fair Value 74,800  
Available for sale securities, Fair Value 82,552 57,105
Held to Maturity securities, Due in one year or less, Amortized Cost 1,235  
Held to Maturity securities, Due after one year through five years, Amortized Cost 4,155  
Held to Maturity securities, Due after five years through ten years, Amortized Cost 2,827  
Held to Maturity securities, Due after ten years, Amortized Cost 4,607  
Held to Maturity securities, Amortized Cost 12,824 12,950
Held to Maturity securities, Due in one year or less, Fair Value 1,255  
Held to Maturity securities, Due after one year through five years, Fair Value 4,292  
Held to Maturity securities, Due after five years through ten years, Fair Value 3,037  
Held to Maturity securities, Due after ten years, Fair Value 4,916  
Held to Maturity securities, Fair Value $ 13,500 $ 13,662