Other Comprehensive Income (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Comprehensive Income (Loss) Components and Tax Effects [Line Items]
Net change in foreign currency translation adjustment, before Tax	$ 7,727			$ (9,311)			$ (2,149)	$ 4,212
Net unrealized gain (loss) on hedging instruments	2,492			(7,562)			(3,918)	372
Reclassification Adjustment from AOCI, before Tax	0						(42)
Other Comprehensive Income (Loss), before Tax	10,219			(16,873)			(6,109)	4,584
Net change in foreign currency translation adjustment, tax	1,705			(1,959)			(434)	896
Net unrealized gain (loss) on hedging instruments, tax expense (benefit)	636			(1,929)			(1,000)	94
Gain (Loss) Arising During Period, Tax	1						(3)
Other Comprehensive Income (Loss), Tax	2,342			(3,888)			(1,437)	990
Net change in foreign currency translation, net of tax	6,022			(7,352)			(1,715)	3,316
Net unrealized gain (loss) on hedging instruments, after tax	1,856			(5,633)			(2,918)	278
Gain (Loss) Arising During Period, after Tax	(1)						(39)
Other comprehensive income (loss), net of tax	$ 7,877	$ 14,374	$ (26,923)	$ (12,985)	$ 2,804	$ 13,775	$ (4,672)	$ 3,594