Investments Schedule of Investments in Marketable Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2017	Jan. 01, 2017	Jul. 02, 2017
Schedule of Available-for-sale Securities [Line Items]
Revenue from Related Parties			$ 37,000	$ 50,000
Purchases Of Finished Products From Equity Method Investees			57,300	54,100
Equity Method Investment, Summarized Financial Information, Current Assets	$ 127,524		127,524		$ 157,117
Equity Method Investment, Summarized Financial Information, Revenue	75,579	$ 74,487	156,426	150,748
Proceeds on Sale of Investment in Marketable Securities			0	3,343
Equity Method Investment, Summarized Financial Information, Cost of Sales	57,699	55,097	119,681	113,408
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)	17,880	19,390	36,745	37,340
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	4,881	$ 5,541	9,897	$ 8,940
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	50,004		50,004		54,748
Equity Method Investment, Summarized Financial Information, Assets	177,528		177,528		211,865
Equity Method Investment, Summarized Financial Information, Liabilities [Abstract]
Equity Method Investment, Summarized Financial Information, Current Liabilities	39,469		39,469		61,346
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	22,714		22,714		25,399
Equity Method Investment, Summarized Financial Information, Liabilities	62,183		62,183		86,745
Equity Method Investment, Summarized Financial Information, Equity Excluding Noncontrolling Interests	$ 115,345		$ 115,345		$ 125,120