Acquisition - DSC (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Mar. 08, 2019	Dec. 31, 2019	Sep. 26, 2020	Sep. 28, 2019
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 111,145	$ 266,373
Deferred acquisition payments			2,785	32,462
Contingent consideration obligation			0	686
Goodwill		$ 695,044	$ 744,470
DSC
Business Acquisition [Line Items]
Date of acquisition	Mar. 08, 2019
Costs associated with acquisition				$ 2,100
Payments to acquire business	$ 49,900
Payments to Acquire Businesses, Net of Cash Acquired	49,400
Fixed deferred business acquisition payment	16,100
Deferred acquisition payments	14,000
Contingent consideration obligation	700
Trade accounts and notes receivable, net	1,840
Inventories, net	4,307
Other current assets	1,437
Property, Plant, and Equipment	16,654
Identifiable Intangible Assets	6,870
Right-of-use assets	79
Deferred tax assets	1,066
Other noncurrent assets	28
Accounts Payable and accrued liabilities	(2,861)
Deferred tax liabilities	(1,802)
Long-term lease liability	(37)
Net assets acquired	27,581
Goodwill	36,540
Total purchase price, net of cash acquired	$ 64,121
Interest Costs Incurred		$ 1,600