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Goodwill And Other Intangible Assets (Other Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Finite-Lived Intangible Assets [Line Items]        
Net carrying value at end of period $ 7,734   $ 7,734  
Other Intangible Assets [Member]
        
Finite-Lived Intangible Assets [Line Items]        
Gross Other Intangible Assets, Balance at beginning of period 2,042 2,042 2,042 2,042
Additions from the SDN acquisition 6,640   6,640  
Gross Other Intangible Assets, Balance at end of period 8,682 2,042 8,682 2,042
Accumulated Amortization: Balance at beginning of period (752) (388) (576) (189)
Amortization (196) (95) (372) (294)
Accumulated Amortization: Balance at end of period (948) (483) (948) (483)
Net carrying value at end of period $ 7,734 $ 1,559 $ 7,734 $ 1,559