CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash Flows from Operating Activities:
Net income	$ 650,521	$ 506,882
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,171	83,180
Impairment charges	0	2,346
Provision for credit losses	5,464	5,112
Deferred income taxes	(14,749)	(36,890)
Share-based compensation expense	44,516	36,491
Other	(12)	2,032
Changes in assets and liabilities:
Accounts receivable	(54,557)	(35,061)
Inventories	(31,647)	(99,621)
Other assets and liabilities	(17,902)	(87,566)
Accounts payable	(6,799)	(3,930)
Deferred revenue	(3,347)	(3,419)
Net cash provided by operating activities	656,659	369,556
Cash Flows from Investing Activities:
Purchases of property and equipment	(101,075)	(99,609)
Acquisition of intangible assets	0	(10,000)
Equity investment	0	(25,000)
Acquisitions of a business, net of cash acquired	0	(11,512)
Proceeds from net investment hedges	6,256	0
Net cash used by investing activities	(94,819)	(146,121)
Cash Flows from Financing Activities:
(Repayments) borrowings under credit facility, net	(329,000)	559,500
Payment of senior debt	0	(75,000)
Payments of acquisition-related contingent consideration and holdbacks	(1,879)	(5,730)
Repurchases of common stock, net	(35,070)	(745,691)
Proceeds from exercises of stock options and employee stock purchase plans	35,704	23,257
Shares withheld for statutory tax withholding payments on restricted stock	(9,907)	(10,552)
Net cash used by financing activities	(340,152)	(254,216)
Net effect of changes in exchange rates on cash	(2,538)	(14,497)
Net increase (decrease) in cash and cash equivalents	219,150	(45,278)
Cash and cash equivalents at beginning of period	112,546	144,454
Cash and cash equivalents at end of period	331,696	99,176
Supplemental Cash Flow Information:
Cash paid for income taxes	160,860	179,720
Unpaid property and equipment, reflected in accounts payable and accrued liabilities	$ 11,328	$ 19,661