Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Operating activities:
Net income	$ 208,345	$ 197,422
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	62,064	54,623
Amortization	41,176	50,400
Share-based compensation expense	16,552	14,915
Provision for deferred income taxes	14,958	(2,123)
Charge for excess and obsolete inventory	11,933	4,646
Other	6,214	9,605
Changes in operating assets and liabilities:
Trade accounts and notes receivable	(65,367)	(30,405)
Inventories	(54,278)	(5,689)
Accounts payable and accrued liabilities	10,076	(31,911)
Other current assets	2,189	11,284
Income taxes payable and refundable income taxes	(11,995)	(20,574)
Other	789	1,461
Net cash provided by operating activities	242,656	253,654
Investing activities:
Acquisition of property, plant and equipment	(79,560)	(86,423)
Payments to Acquire Businesses, Net of Cash Acquired	111,145	266,373
Other	265	2,815
Net cash used in investing activities	(190,440)	(349,981)
Financing activities:
Proceeds from short-term borrowings	217,000	0
Payments of short-term borrowings	(217,000)	0
Proceeds from long-term debt	400,000	0
Payments of long-term debt	(251,000)	(2,000)
Payments for debt issuance costs	(3,964)	0
Payments of Dividends	32,446	29,779
Issuance of common stock	4,899	4,351
Repurchase and retirement of common stock	(29,564)	(65,321)
Taxes paid related to net share settlement of equity awards	(24,556)	(8,577)
Deferred acquisition payments	16,125	0
Other	(2,892)	(502)
Net cash provided by (used in) financing activities	44,352	(101,828)
Effect of exchange rate changes on cash and cash equivalents	(507)	(1,159)
Increase (decrease) in cash and cash equivalents	96,061	(199,314)
Cash and cash equivalents at beginning of period	351,911	482,062
Cash and cash equivalents at end of period	447,972	282,748
Supplemental Cash Flow Information
Deferred acquisition payments	2,785	32,462
Contingent consideration obligation	0	686
Equipment purchases in accounts payable	7,543	3,431
Changes in dividends payable	74	307
Schedule of interest and taxes paid
Interest paid	33,164	37,366
Income taxes paid, net of refunds received	$ 35,544	$ 66,474