Business Acquisitions, Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) shares in Thousands			3 Months Ended		4 Months Ended	9 Months Ended
	Nov. 30, 2015	Sep. 29, 2014	Mar. 25, 2016	Mar. 27, 2015	Mar. 25, 2016	Mar. 25, 2016	Mar. 27, 2015	Sep. 25, 2015	Jun. 30, 2015	Dec. 26, 2014
Business Acquisition [Line Items]
Goodwill			$ 75,337,000		$ 75,337,000	$ 75,337,000			$ 37,024,000
Amortization period of identifiable intangible assets						6 years
Gross revenue			158,130,000	$ 130,777,000		$ 451,332,000	$ 397,030,000
Net service revenue			121,253,000	100,994,000		332,798,000	293,451,000
Segment profit (loss)			(23,302,000)	7,149,000		(8,931,000)	20,007,000
Amortization of Intangible Assets			3,162,000	$ 905,000		$ 5,078,000	$ 2,633,000
NOVA Safety & Environmental
Business Acquisition [Line Items]
Goodwill										$ 3,683,000
Cash paid		$ 7,198,000
Second cash payment		2,092,000
Estimated net working capital adjustment		560,000
Additions for fiscal year 2015 acquisitions		1,500,000						$ 893,000
Second cash payment		2,600,000
Cash paid out of escrow		$ 508,000
Shares issued in business acquisition (in shares)		50
Shares issued in business acquisition, value		$ 323,000
Total identifiable intangible assets										$ 3,622,000
Pipeline Services
Business Acquisition [Line Items]
Goodwill	$ 62,778,000
Purchase price	125,715,000
Cash paid	119,955,000
Cash and cash equivalents	355,000
Second cash payment	7,500,000
Total identifiable intangible assets	44,500,000
Customer relationships and backlog | Pipeline Services
Business Acquisition [Line Items]
Amortization period of identifiable intangible assets						6 years
Total identifiable intangible assets	43,500,000
Internally developed software | Pipeline Services
Business Acquisition [Line Items]
Intangible asset, useful life						5 years
Amortization period of identifiable intangible assets						3 years
Total identifiable intangible assets	$ 1,000,000
Customer relationships
Business Acquisition [Line Items]
Amortization period of identifiable intangible assets						6 years
Minimum | Customer relationships and backlog | Pipeline Services
Business Acquisition [Line Items]
Intangible asset, useful life						1 year
Maximum | Customer relationships and backlog | Pipeline Services
Business Acquisition [Line Items]
Intangible asset, useful life						15 years
Pipeline Services
Business Acquisition [Line Items]
Goodwill			$ 38,313,000		38,313,000	$ 38,313,000			$ 0
Segment profit (loss)					$ (4,289,000)