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Derivative Activities (Netting Of Derivative Contracts) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Derivative Activities [Abstract]    
Asset derivatives, gross $ 29,330 $ 89,616
Asset derivatives, netting (12,188) (2,960)
Asset derivatives, net 17,142 86,656
Liability derivatives, gross 45,480 17,484
Liability derivatives, netting (12,188) (2,960)
Liability derivatives, net $ 33,292 $ 14,524