Business Segment Information - Additional Information (Details)	6 Months Ended	12 Months Ended
	Dec. 24, 2017 USD ($)	Jun. 30, 2019 USD ($) Segment	Jun. 24, 2018 USD ($) Segment	Jun. 25, 2017 USD ($)	Dec. 23, 2016
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment		4	3
Techologies credit (expense)		$ 5,209,000	$ 2,103,000
Renewables [Member]
Segment Reporting Information [Line Items]
Majority equity ownership interest percentage by parent					60.00%
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Techologies credit (expense)	$ 0			$ 0