CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows from Operating Activities:
Net income	$ 438,290	$ 325,944
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	56,186	54,633
Impairment charges	0	2,346
Provision for credit losses	3,857	3,358
Deferred income taxes	(12,932)	(23,517)
Share-based compensation expense	29,292	23,543
Other	(157)	1,200
Changes in assets and liabilities:
Accounts receivable	(61,158)	(53,794)
Inventories	(38,906)	(49,349)
Other assets and liabilities	(24,236)	(94,729)
Accounts payable	(4,155)	(6,735)
Deferred revenue	(1,855)	(2,344)
Net cash provided by operating activities	384,226	180,556
Cash Flows from Investing Activities:
Purchases of property and equipment	(66,981)	(61,924)
Acquisition of intangible assets	0	(10,000)
Equity investment	0	(25,000)
Net cash used by investing activities	(66,981)	(96,924)
Cash Flows from Financing Activities:
(Repayments) borrowings under credit facility, net	(315,000)	537,500
Payment of senior debt	0	(75,000)
Proceeds from maturity of net investment hedges	6,256	0
Payments of acquisition-related contingent consideration and holdbacks	(1,780)	(2,816)
Repurchases of common stock, net	0	(573,060)
Proceeds from exercises of stock options and employee stock purchase plans	23,086	18,379
Shares withheld for statutory tax withholding payments on restricted stock	(9,676)	(10,390)
Net cash used by financing activities	(297,114)	(105,387)
Net effect of changes in exchange rates on cash	161	(8,337)
Net increase (decrease) in cash and cash equivalents	20,292	(30,092)
Cash and cash equivalents at beginning of period	112,546	144,454
Cash and cash equivalents at end of period	132,838	114,362
Supplemental Cash Flow Information:
Cash paid for income taxes	97,127	128,325
Unpaid property and equipment, reflected in accounts payable and accrued liabilities	$ 15,448	$ 10,340