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Goodwill And Other Intangible Assets (Changes In Carrying Amount Of Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Goodwill And Other Intangible Assets [Abstract]  
Goodwill, beginning balance $ 48,536
Addition from the SDN acquisition 12,617
Goodwill, ending balance $ 61,153