The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

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- Definition

Aggregate revenue during the period for services rendered in the normal course of business (before deducting allowances and discounts) which are not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

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Operating Segments - Segment Summary (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 28, 2014	Dec. 27, 2013	Sep. 27, 2013	Jun. 30, 2013	Mar. 29, 2013	Dec. 28, 2012	Sep. 28, 2012	Jun. 30, 2014 segments	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Number of operating segments (in segments)									3
Sales Revenue, Services, Other	$ 125,675	$ 120,836	$ 122,592	$ 106,574	$ 118,955	$ 109,806	$ 104,470	$ 108,286	$ 475,677	$ 441,517	$ 419,959
Net service revenue	94,492	88,081	91,131	81,252	86,889	83,044	75,254	75,216	354,956	320,403	301,780
Segment profit	8,961	2,511	5,195	4,254	6,164	3,392	4,399	4,606	20,921	18,561	29,956
Depreciation and amortization									8,800	6,903	5,508
Total [Member]
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other									469,846	438,949	417,020
Net service revenue									350,276	317,250	298,562
Segment profit									70,546	62,760	63,210
Depreciation and amortization									6,382	4,710	3,646
Energy
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other									160,651	138,189	125,219
Net service revenue									132,795	109,815	96,018
Segment profit									26,468	23,261	23,517
Depreciation and amortization									3,253	1,868	1,171
Environmental
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other									245,944	240,820	235,089
Net service revenue									170,506	163,217	159,016
Segment profit									35,324	30,836	31,955
Depreciation and amortization									2,703	2,397	1,996
Infrastructure
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other									63,251	59,940	56,712
Net service revenue									46,975	44,218	43,528
Segment profit									8,754	8,663	7,738
Depreciation and amortization									$ 426	$ 445	$ 479