Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Acquisitions and Dispositions (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	May 31, 2018	Jan. 31, 2018	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017	Dec. 30, 2017
Business Combinations [Abstract]
Acquisitions, net of cash acquired	$ 51,100				$ 51,089	$ 12,369
Property, Plant, and Equipment	15,200
Finite-Lived Intangibles	15,900
Goodwill	19,600		$ 1,232,964		1,232,964		$ 1,301,093
Other assets	$ 400
Weighted average useful life	15 years
Proceeds from sale of investment in subsidiary	$ 80,000				82,805	0
Loss on sale of subsidiary	$ 15,500		$ 15,538	$ 0	$ 15,538	$ 0
Proceeds from Divestiture of Businesses		$ 2,800