CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Flows from Operating Activities:
Net income	$ 887,867	$ 845,042	$ 679,089
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	129,936	114,908	111,900
Impairment charges	250	1,484	2,346
Provision for uncollectible accounts	6,867	5,552	5,829
Deferred income taxes	(24,194)	(48,306)	(35,065)
Share-based compensation expense	60,295	59,739	49,770
Other	1,218	520	2,645
Changes in assets and liabilities:
Accounts receivable	(28,280)	(53,871)	(41,398)
Inventories	(28,001)	(28,651)	(121,731)
Accounts payable	8,086	(557)	3,467
Deferred revenue	(4,378)	(3,032)	(11,019)
Other assets and liabilities	(80,665)	13,682	(102,849)
Net cash provided by operating activities	929,001	906,510	542,984
Cash Flows from Investing Activities:
Purchases of property and equipment	(120,922)	(133,631)	(148,838)
Acquisitions of intangible assets	(10,000)	0	(10,000)
Equity investments	(1,004)	0	(25,000)
Acquisitions of businesses, net of cash acquired	(76,694)	0	(11,512)
Proceeds from net investment hedges	1,558	8,377	0
Net cash used by investing activities	(207,062)	(125,254)	(195,350)
Cash Flows from Financing Activities:
(Payments) borrowings on credit facility, net	0	(329,000)	505,500
Payments of senior notes	(75,000)	(75,000)	(75,000)
Debt issuance costs	0	0	(435)
Repurchases of common stock	(837,034)	(71,920)	(819,711)
Proceeds from exercises of stock options and employee stock purchase plans	44,492	47,034	35,747
Payments of acquisition-related contingent consideration and holdbacks	0	(3,135)	(6,431)
Shares withheld for statutory tax withholding payments on restricted stock	(10,531)	(9,975)	(10,606)
Net cash used by financing activities	(878,073)	(441,996)	(370,936)
Net effect of changes in exchange rates on cash	(9,532)	2,126	(8,606)
Net increase (decrease) in cash and cash equivalents	(165,666)	341,386	(31,908)
Cash and cash equivalents at beginning of period	453,932	112,546	144,454
Cash and cash equivalents at end of period	$ 288,266	$ 453,932	$ 112,546