Business Acquisitions, Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Dec. 25, 2015	Dec. 25, 2015
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period	$ 76,619
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	(39,595)
Goodwill, Beginning of Period	37,024
Goodwill, Period Increase (Decrease)	64,673
Gross Goodwill, End of Period	141,292
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	(39,595)
Goodwill	37,024	$ 101,697
Energy
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period	28,506
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	(14,506)
Goodwill, Beginning of Period	14,000
Goodwill, Period Increase (Decrease)	0
Gross Goodwill, End of Period	28,506
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	(14,506)
Goodwill	14,000	14,000
Environmental
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period	40,889
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	(17,865)
Goodwill, Beginning of Period	23,024
Goodwill, Period Increase (Decrease)	0
Gross Goodwill, End of Period	40,889
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	(17,865)
Goodwill	23,024	23,024
Infrastructure
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period	7,224
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	(7,224)
Goodwill, Beginning of Period	0
Goodwill, Period Increase (Decrease)	0
Gross Goodwill, End of Period	7,224
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	(7,224)
Goodwill	0	0
Pipeline Services
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period	0
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period	0
Goodwill, Beginning of Period	0
Goodwill, Period Increase (Decrease)	64,673
Gross Goodwill, End of Period	64,673
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	0
Goodwill	$ 0	$ 64,673