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Stockholders' Deficit Stockholders' (Deficit) Equity (Changes In Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Stockholders' Equity Note [Abstract]      
Foreign Currency Translation Adjustmentss Loss, Changes $ 0 $ 530  
Foreign Currency Translation Adjustment, Balance (2,836) (2,836) $ (3,366)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax 130 (18)  
Accumulated Other Comprehensive Income (Loss), Debt Securities, Available-for-sale, Adjustment, after Tax 25 (105) (87)
Other Comprehensive Income (Loss), Net of Tax 130 512 540
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (2,811) $ (2,941) $ (3,453)