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Derivative Activities (Netting Of Derivative Contracts) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Derivative Activities [Abstract]    
Asset derivatives, gross $ 68,388 $ 89,616
Asset derivatives, netting (3,509) (2,960)
Asset derivatives, net 64,879 86,656
Liability derivatives, gross 19,631 17,484
Liability derivatives, netting (3,509) (2,960)
Liability derivatives, net $ 16,122 $ 14,524