Income Taxes (Schedule Of Income Tax Expense) (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Taxes [Abstract]
U.S. Federal, current	$ (1,697)	$ (14,831)	$ 85,633
State and local, current	(3,567)	10,110	804
Foreign, current	11,474	29,817	9,047
Current income tax expense (benefit), total	6,210	25,096	95,484
U.S. Federal, deferred	1,815	(249)	8,337
State and local, deferred	1,409	(550)	(213)
Foreign, deferred	(5,590)	8,427	(702)
Deferred income tax expense, total	(2,366)	7,628	7,422
Total income tax expense	$ 3,844	$ 32,724	$ 102,906