Income Taxes (Schedule Of Income Tax Expense) (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
U.S. Federal, current	$ (1,033)	$ 619	$ (87)
State and local, current	498	798	822
Foreign, current	(2,379)	6,002	4,626
Current income tax expense (benefit), total	(2,914)	7,419	5,361
U.S. Federal, deferred	3,926	(12,322)	8,999
State and local, deferred	1,196	1,194	1,663
Foreign, deferred	1,933	(1,653)	1,365
Deferred income tax expense (benefit), total	7,055	(12,781)	12,027
Total income tax expense (benefit)	$ 4,141	$ (5,362)	$ 17,388