Acquisitions and Purchase Accounting Estimated Fair Values of Assets Acquired and Liabilities Assumed - Scanico (Details) - USD ($) $ in Thousands		9 Months Ended
	Dec. 07, 2017	Sep. 29, 2018	Sep. 30, 2017	Dec. 30, 2017
Business Acquisition [Line Items]
Goodwill		$ 1,823,258		$ 1,264,810
Payments to Acquire Businesses, Net of Cash Acquired		1,147,738	$ 159,458
Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 6,766
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	3,317
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	420
Goodwill	30,542
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	11,491
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(8,015)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net	(3,275)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	41,246
Business Combination, Contingent Consideration, Liability	751
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	41,997
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	2,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	800
Payments to Acquire Businesses, Net of Cash Acquired	34,500
Business Combination, Provisional Information Adjustment, Working Capital	300
Scenario, Previously Reported [Member] | Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	6,766
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	3,428
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	447
Goodwill	30,072
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	11,491
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(7,987)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net	(3,305)
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	40,912
Business Combination, Contingent Consideration, Liability	751
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	41,663
Scenario, Adjustment [Member] | Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	(111)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	(27)
Goodwill	470
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(28)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Net	30
Business Combination Recognized Identifiable Assets Acquired Goodwill And Liabilities Assumed Initial Consideration, Net	334
Business Combination, Contingent Consideration, Liability	0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	334
Food Processing Group [Member]
Business Acquisition [Line Items]
Goodwill		$ 214,039		$ 198,278
Trade Names [Member] | Food Processing Group [Member] | Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	6,600
Customer Relationships [Member] | Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 2,000
Customer Relationships [Member] | Food Processing Group [Member] | Scanico [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Developed Technology Rights [Member] | Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 900
Developed Technology Rights [Member] | Food Processing Group [Member] | Scanico [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Backlog [Member] | Scanico [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 2,000
Backlog [Member] | Food Processing Group [Member] | Scanico [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 months