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Investment Securities (Summary Of Sales Transactions In The Investment Securities Available For Sale Portfolio) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Investments [Abstract]        
Proceeds from sale and maturity of investment securities available for sale $ 0 $ 0 $ 82,156 $ 20,815
Gross realized gains 0 0 2,710 1,419
Gross realized losses 0 0 0 (88)
Investment securities gains, net $ 0 $ 0 $ 2,710 $ 1,331