Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Taxes [Abstract]
Federal - Current	$ (304)	$ (212)
Foreign - Current	2,154	1,112
State - Current	306	128
U.S. Deferred tax benefit	39,000	74
Total income tax expense (benefit)	$ 41,156	$ 1,102