Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cash flows from operating activities:
Cash received from customers	$ 1,304,900	$ 1,265,500
Cash paid to suppliers and employees	(993,900)	(1,084,900)
Interest paid, net	(23,100)	(23,300)
Income tax payments, net	(56,100)	(52,200)
Investment proceeds and miscellaneous receipts, net	48,900	51,000
Proceeds from forward foreign exchange contracts, net	(34,300)	11,300
Net cash provided by operating activities	246,400	167,400
Cash flows from investing activities:
Capital expenditures	(80,100)	(82,500)
Payments for purchases of marketable securities and investments	(306,600)	(654,500)
Proceeds from maturities of marketable securities and investments	45,200	126,400
Proceeds from Sale of Debt Securities, Available-for-sale	445,600	536,500
Net cash used in investing activities	(112,500)	(74,000)
Cash flows from financing activities:
Payments on long-term borrowings	(300)	(300)
Payments for debt issuance costs	0	(600)
Proceeds from Issuance of Common Stock	8,500	10,200
Payments for purchases of treasury stock	(242,100)	(105,700)
Net cash used in financing activities	(234,000)	(96,600)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(18,000)	6,500
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(118,100)	3,300
Beginning Cash, Cash Equivalents, and Restricted Cash	489,800	404,400
Cash and cash equivalents	369,300	406,900
Restricted Cash, Current	2,000	400
Restricted Cash, Noncurrent	400	400
Ending Cash, Cash Equivalents, and Restricted Cash	371,700	407,700
Proceeds from dispositions of property, plant and equipment	100	100
Payments for Previous Acquisition	216,700	0
Payment, Tax Withholding, Share-based Payment Arrangement	$ 100	$ 200