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Securities Sold Under Agreements To Repurchase (Securities Sold Under Agreements to Repurchase) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]    
Repurchase Amount $ 224,882 $ 137,075
Weighted Average Interest Rate 0.07% 0.14%
Carrying Value of Underlying Assets 229,439 139,373
Market Value of Underlying Assets $ 229,439 $ 139,373