Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Business acquisition deferred payment, net present value	$ 14,001
Operating activities:
Net income	32,658	$ 57,562
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	16,721	15,897
Amortization	18,657	11,669
Share-based compensation expense	4,653	4,128
Provision for deferred income taxes	6	(721)
Other	5,688	1,503
Changes in operating assets and liabilities:
Trade accounts and notes receivable	(9,109)	(6,011)
Inventories	(2,131)	(14,955)
Accounts payable and accrued liabilities	(45,019)	(33,985)
Other current assets	17,778	(682)
Income taxes payable and refundable income taxes	(42,873)	6,692
Other	433	(2,280)
Net cash (used in) provided by operating activities	(2,538)	38,817
Investing activities:
Acquisition of property, plant and equipment	(34,465)	(37,656)
Payments to Acquire Businesses, Net of Cash Acquired	49,789	21,047
Other	197	146
Net cash used in investing activities	(84,057)	(58,557)
Financing activities:
Payments of long-term debt	(1,000)	(25,000)
Payments for dividends	(9,470)	(9,883)
Issuance of common stock	917	473
Repurchase and retirement of common stock	(35,321)	(10,000)
Taxes paid related to net share settlement of equity awards	(7,727)	(14,123)
Other	(250)	(246)
Net cash used in financing activities	(52,851)	(58,779)
Effect of exchange rate changes on cash and cash equivalents	(256)	3,347
Decrease in cash and cash equivalents	(139,702)	(75,172)
Cash and cash equivalents at beginning of period	482,062	625,408
Cash and cash equivalents at end of period	342,360	550,236
Supplemental Cash Flow Information [Abstract]
Deferred acquisition payment		0
Contingent consideration obligation	686	0
Equipment purchases in accounts payable	7,486	7,597
Dividends Payable	65	30
Schedule of interest and taxes paid
Interest paid	17,124	8,000
Income taxes paid, net of refunds received	$ 47,770	$ 8,031