Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 159,971	$ 113,407
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	48,236	43,173
Amortization	45,102	33,003
Share-based compensation expense	12,727	11,457
Provision for deferred income taxes	(1,066)	254
Other	10,584	24,028
Changes in operating assets and liabilities:
Trade accounts and notes receivable	(8,713)	(15,345)
Inventories	(28,788)	(14,884)
Accounts payable and accrued liabilities	(9,440)	7,598
Other current assets	1,390	3,883
Income taxes payable and refundable income taxes	(9,193)	1,664
Other	439	(606)
Net cash provided by operating activities	221,249	207,632
Investing activities:
Acquisition of property, plant and equipment	(75,337)	(67,939)
Acquisition of businesses, net of cash acquired	(380,268)	(20,000)
Other	5,014	1,074
Net cash used in investing activities	(450,591)	(86,865)
Financing activities:
Payments of long-term debt	(27,000)	(75,000)
Payments for dividends	(29,701)	0
Issuance of common stock	3,029	3,582
Repurchase and retirement of common stock	(30,000)	(18,000)
Taxes paid related to net share settlement of equity awards	(14,552)	(5,407)
Other	1,254	(1,270)
Net cash used in financing activities	(96,970)	(96,095)
Effect of exchange rate changes on cash and cash equivalents	(4,203)	4,136
(Decrease) increase in cash and cash equivalents	(330,515)	28,808
Cash and cash equivalents at beginning of period	625,408	406,389
Cash and cash equivalents at end of period	294,893	435,197
Supplemental Cash Flow Information [Abstract]
Capital Expenditures Incurred but Not yet Paid	9,464	6,857
Capital Lease Obligations Incurred	0	4,768
Schedule of interest and taxes paid
Interest paid	23,070	16,167
Income taxes paid, net of refunds received	$ 44,249	$ 27,826