Goodwill and Other Intangible Assets - Goodwill (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended				0 Months Ended
	Dec. 27, 2013	Dec. 27, 2013 Energy Operating Segment	Dec. 27, 2013 Environmental Operating Segment	Dec. 27, 2013 Infrastructure Operating Segment	Jul. 22, 2013 Utility Support Systems Inc. [Member]
Goodwill [Line Items]
Business Acquisition, Purchase Price					$ 5,027
Business Acquisition, Cash Paid					2,500
Business Acquisition, Cash Paid in Year Two					1,803
Goodwill [Roll Forward]
Goodwill, Gross	68,392	24,954	36,214	7,224
Goodwill, Impaired, Accumulated Impairment Loss	(39,595)	(14,506)	(17,865)	(7,224)
Goodwill	28,797	10,448	18,349	0
Goodwill, Period Increase (Decrease)	2,635	2,635	0	0
Goodwill, Gross	71,027	27,589	36,214	7,224
Goodwill, Impaired, Accumulated Impairment Loss	(39,595)	(14,506)	(17,865)	(7,224)
Goodwill	31,432	13,083	18,349	0	2,180
Business Acquisition, Intangible Assets Other than Goodwill					2,056
Business Acquisition, Equity Interest Issued or Issuable (in shares)					34,066
Business Acquisition, Equity Interests Issued and Issuable					295
Additions for fiscal year 2014 acquisitions	$ 504				$ 504