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Property And Equipment (Narrative) (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
Property And Equipment [Abstract]        
Depreciation and amortization expense $ 3,828 $ 2,552 $ 10,320 $ 6,984