Operating Segments - Segment Detail (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 27, 2013		Sep. 28, 2012
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other	$ 106,574		$ 108,286
Net service revenue	81,252		75,216
Operating income (loss)	4,254		4,606
Corporate shared services(2)	(10,215)	[1]	(8,925)	[1]
Allocated Share-based Compensation Expense	(1,155)		(909)
Depreciation and amortization	(2,176)		(1,538)
Interest expense	(92)		(112)
Income from operations before taxes	4,162		4,494
Operating Segments
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other	105,374		106,858
Net service revenue	79,753		74,265
Operating income (loss)	16,258		14,982
Depreciation and amortization	(1,542)		(996)
Reconciling Items
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other	1,200	[2]	1,428	[2]
Net service revenue	1,499	[2]	951	[2]
Unallocated
Segment Reporting Information [Line Items]
Depreciation and amortization	(634)		(542)
Energy
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other	33,464		32,174
Net service revenue	28,814		25,643
Operating income (loss)	4,104		6,000
Depreciation and amortization	(758)		(333)
Environmental
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other	55,522		58,599
Net service revenue	38,361		37,376
Operating income (loss)	9,347		6,915
Depreciation and amortization	(680)		(541)
Infrastructure
Segment Reporting Information [Line Items]
Sales Revenue, Services, Other	16,388		16,085
Net service revenue	12,578		11,246
Operating income (loss)	2,807		2,067
Depreciation and amortization	$ (104)		$ (122)

[1] Corporate shared services consist of centrally managed functions in the following areas: accounting, treasury, information technology, legal, human resources, marketing, internal audit and executive management such as the CEO and various executives. These costs and other items of a general corporate nature are not allocated to the Company’s three operating segments.

[2] Amounts represent certain unallocated corporate amounts not considered in the CODM's evaluation of operating segment performance.