Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 409,126	$ 294,969	$ 254,860
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	90,311	83,430	74,975
Amortization	47,856	53,092	66,428
Share-based compensation expense	29,884	22,920	19,629
Provision for deferred income taxes	(18,433)	(7,250)	(14,008)
Charge for excess and obsolete inventory	17,103	15,387	11,433
Loss on extinguishment of debt and modification	23,338	2,378	0
Other	(2,000)	1,090	12,118
Changes in operating assets and liabilities, net of effects of acquisitions:
Trade accounts receivable and notes receivable	(86,766)	(27,461)	(3,164)
Inventories	(168,372)	(50,772)	(21,354)
Accounts payable and other accrued liabilities	53,577	40,162	(22,647)
Other current assets	2,870	(11,952)	7,784
Income taxes payable, refundable income taxes and noncurrent taxes payable	(3,292)	28,490	(3,494)
Other	5,252	2,191	(262)
Net cash provided by operating activities	400,454	446,674	382,298
Investing activities:
Acquisition of property and equipment	(210,626)	(131,752)	(112,355)
Acquisition of business, net of cash acquired	(91,942)	(111,912)	(277,369)
Other	4,450	338	3,884
Net cash used in investing activities	(298,118)	(243,326)	(385,840)
Financing activities:
Proceeds from short-term borrowings	101,000	217,000	0
Payments of short-term borrowings	(101,000)	(217,000)	0
Proceeds from long-term debt	400,000	400,000	0
Payments of long-term debt	(550,000)	(251,000)	(4,000)
Payments for debt issuance costs	(5,069)	(3,964)	0
Payments for debt extinguishment costs	(19,080)	0	0
Payments for dividends	(43,545)	(43,245)	(40,566)
Issuance of common stock from employee stock plans	24,744	8,738	7,291
Taxes paid related to net share settlement of equity awards	(16,090)	(24,800)	(8,722)
Repurchase and retirement of common stock	(67,109)	(44,563)	(80,321)
Deferred acquisition payment	0	(16,125)	0
Other	(348)	(2,892)	(502)
Net cash (used in) provided by financing activities	(276,497)	22,149	(126,820)
Effect of exchange rate changes on cash and cash equivalents	(4,167)	3,485	211
(Decrease) increase in cash and cash equivalents	(178,328)	228,982	(130,151)
Cash and cash equivalents at beginning of year	580,893	351,911	482,062
Cash and cash equivalents at end of year	402,565	580,893	351,911
Supplemental Cash Flow Information
Contingent consideration obligation	0	0	686
Deferred acquisition payments, net	250	1,482	19,848
Equipment purchases in accounts payable	29,042	11,921	11,285
Increase in dividends payable	66	245	349
Schedule of interest and income taxes paid:
Interest paid	46,791	42,575	41,711
Income taxes, net of refunds received	$ 88,059	$ 37,228	$ 77,970