Other Comprehensive Income (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Comprehensive Income (Loss) Components and Tax Effects [Line Items]
Net change in foreign currency translation adjustment, before Tax	$ 11,710		$ 9,160		$ (9,876)	$ 13,523
Net unrealized gain (loss) on hedging instruments	6,914		(6,014)		(6,410)	7,934
Net change in foreign currency translation adjustment, tax	2,488		1,950		(2,139)	2,855
Net unrealized gain (loss) on hedging instruments, tax expense (benefit)	1,762		(1,534)		(1,636)	2,023
Net change in foreign currency translation, net of tax	9,222		7,210		(7,737)	10,668
Net unrealized gain (loss) on hedging instruments, after tax	5,152		(4,480)		(4,774)	5,911
Reclassification Adjustment from AOCI, before Tax			74		(42)
Gain (Loss) Arising During Period, Tax			0		(4)
Gain (Loss) Arising During Period, after Tax			74		(38)
Other Comprehensive Income (Loss), before Tax	18,624		3,220		(16,328)	21,457
Other Comprehensive Income (Loss), Tax	4,250		416		(3,779)	4,878
Other comprehensive income (loss), net of tax	$ 14,374	$ (26,923)	$ 2,804	$ 13,775	$ (12,549)	$ 16,579