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Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Income Taxes [Abstract]        
Federal - Current     $ (81) $ (678)
Foreign - Current     24,992 3,379
State - Current     7,712 162
U.S. Deferred tax benefit     10,936 1,360
Total income tax expense (benefit) $ 2,403 $ 3,121 $ 43,559 $ 4,223