Accumulated Other Comprehensive Income (Schedule Associated with Cash Flow Hedges and Pension of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	$ 357,224	$ 337,796
Tax expense	53,634	47,526
Gain (loss), net of tax	214,054	193,965
Cash flow hedge | Reclassification out of accumulated other comprehensive income | Foreign currency exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	335	2,236
Tax expense	117	610
Gain (loss), net of tax	218	1,626
Defined benefit plans | Reclassification out of accumulated other comprehensive income
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Cost of revenue	(139)	0
Tax expense	(20)	0
Gain (loss), net of tax	$ (119)	$ 0