CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities:
Net income	$ 235,579	$ 214,054
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,904	28,331
Impairment charge	250	0
Provision for credit losses	1,530	2,325
Deferred income taxes	(2,571)	(3,757)
Share-based compensation expense	14,400	13,930
Other	909	(362)
Changes in assets and liabilities:
Accounts receivable	(53,841)	(44,133)
Inventories	(2,412)	(23,887)
Other assets and liabilities	(21,416)	(5,307)
Accounts payable	(4,450)	3,327
Deferred revenue	703	(609)
Net cash provided by operating activities	198,585	183,912
Cash Flows from Investing Activities:
Purchases of property and equipment	(30,273)	(39,511)
Acquisitions of a business	(77,000)	0
Proceeds from net investment hedges	329	0
Net cash used by investing activities	(106,944)	(39,511)
Cash Flows from Financing Activities:
Repayments under credit facility, net	0	(147,500)
Payments of acquisition-related holdbacks	0	(1,780)
Repurchases of common stock, net	(154,764)	0
Proceeds from exercises of stock options and employee stock purchase plans	20,879	12,796
Shares withheld for statutory tax withholding payments on restricted stock	(10,189)	(9,597)
Net cash used by financing activities	(144,074)	(146,081)
Net effect of changes in exchange rates on cash	(4,066)	501
Net decrease in cash and cash equivalents	(56,499)	(1,179)
Cash and cash equivalents at beginning of period	453,932	112,546
Cash and cash equivalents at end of period	397,433	111,367
Supplemental Cash Flow Information:
Cash paid for income taxes	13,233	7,200
Unpaid property and equipment, reflected in accounts payable and accrued liabilities	$ 15,182	$ 12,453