Segment Information Business Optimization Charges Impact on Gross Profit by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2017	Jan. 01, 2017
Cost Of Goods Sold Business Optimization Charges	$ 1,457	$ 0	$ 2,650	$ 0
Engines [Member]
Cost Of Goods Sold Business Optimization Charges	703	0	1,128	0
Products [Member]
Cost Of Goods Sold Business Optimization Charges	$ 754	$ 0	$ 1,522	$ 0