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Goodwill And Other Intangible Assets (Changes In The Accumulated Amortization And Net Book Value) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Goodwill And Other Intangible Assets [Abstract]          
Gross carrying amount $ 12,610   $ 12,610   $ 8,682
Accumulated amortization (3,084)   (3,084)   (2,138)
Net carrying value at end of period 9,526   9,526   $ 6,544
Amortization during the year $ 309 $ 233 $ 946 $ 714