Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Loss By Component) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance	$ (16,651)
Other comprehensive gain (loss) before reclassifications	(1,336)
Other comprehensive income (loss)	(1,336)	$ (5,236)
Accumulated other comprehensive loss, net of tax, ending balance	(17,987)
Foreign currency translation adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance	(8,375)
Other comprehensive gain (loss) before reclassifications	(2,420)
Other comprehensive income (loss)	(2,420)
Accumulated other comprehensive loss, net of tax, ending balance	(10,795)
Derivative instruments, net of tax [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance	(6,742)
Other comprehensive gain (loss) before reclassifications	945
Other comprehensive income (loss)	945
Accumulated other comprehensive loss, net of tax, ending balance	(5,797)
Other [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated other comprehensive loss, net of tax, beginning balance	(1,534)
Other comprehensive gain (loss) before reclassifications	139
Other comprehensive income (loss)	139
Accumulated other comprehensive loss, net of tax, ending balance	$ (1,395)