Segment Information Restructuring Charges and Acquisition Related Charges Impact on Gross Profit by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 01, 2017	Dec. 27, 2015	Jan. 01, 2017	Dec. 27, 2015
Cost Of Goods Sold Restructuring Charges and Acquisition Related Charges	$ 0	$ 2,647	$ 0	$ 5,356
Engines [Member]
Cost Of Goods Sold Restructuring Charges and Acquisition Related Charges	0	0	0	464
Products [Member]
Cost Of Goods Sold Restructuring Charges and Acquisition Related Charges	$ 0	$ 2,647	$ 0	$ 4,892