Commitments and Contingencies	3 Months Ended
Sep. 27, 2013
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Exit Strategy Contracts The Company has entered into a number of long-term contracts pursuant to its Exit Strategy program under which it is obligated to complete the remediation of environmental conditions at covered sites. The Company assumes the risk for remediation costs for pre-existing site environmental conditions and believes that through in-depth technical analysis, comprehensive cost estimation and creative remedial approaches it is able to execute strategies which protect the Company's return on these projects. The Company's client pays a fixed price and, as additional protection, for a majority of the contracts the client also pays for a cleanup cost cap insurance policy. The policy, which includes the Company as a named or additional insured party, provides coverage for cost increases from unknown or changed conditions up to a specified maximum amount significantly in excess of the estimated cost of remediation. The Company believes that it is adequately protected from risk on these projects and that it is not likely that it will incur material losses in excess of applicable insurance. However, because three projects are near the term or financial limits of the insurance and one project may require a material change to the remedy proposed by the Company, the Company believes it is reasonably possible that events could occur under certain circumstances which could be material to the Company's condensed consolidated financial statements. With respect to these four projects, there is a wide range of potential outcomes that may result in costs being incurred beyond the limits or term of insurance, such as: (i) greater than expected volumes of contaminants requiring remediation; (ii) wastewater treatment systems requiring operation beyond the insurance term; and (iii) greater than expected allocable share of the ultimate remedy. The Company does not believe these outcomes are likely, and the exact nature, impact and duration of any such occurrence could vary due to a number of factors. Accordingly, the Company is unable to provide an estimate of loss with a reasonable degree of accuracy. Nevertheless, if these events were to occur, the Company believes that it is reasonably possible that the amount of costs currently accrued, which represents the Company's best estimate, could increase by as much as $25,000, of which $3,000 would be covered by insurance. With respect to one of the projects noted above, the regulatory agency charged with oversight of the project issued a proposed remedial plan that is more expensive than the remedy proposed by the Company. A cost allocation among the potentially responsible parties has not been finalized. The Company's share of the potential remedial costs ranges from $0 to $18,000. However, the Company (and the party from whom it assumed site responsibility) did not contribute in any way to the site contamination, and the Company believes that it has meritorious defenses to liability and that it would not ultimately be responsible for any material remedial costs even if the more costly remedy is selected. Nevertheless, due to uncertainty over the cost allocation process, it is reasonably possible that the Company's recorded estimate could change. The Company adjusts recorded liabilities as further information develops or circumstances change. The Company is unable to accurately project the time period over which these amounts would ultimately be paid out, however the Company estimates that any potential payments could be made over a 2 to 5 year period. Certain Exit Strategy contracts entered into by the Company involved the Company entering into consent decrees with government authorities and assuming the obligation for the settling responsible parties' statutory environmental remediation liability at the sites. The Company's expected remediation costs for the aforementioned contracts (included within current and long-term deferred revenue in the condensed consolidated balance sheets) are funded by the contract price and insured by the environmental remediation cost cap policy (current and long-term restricted investments in the condensed consolidated balance sheets). As of September 27, 2013, the remediation for five projects has been completed. Additionally, remediation has been substantially completed at three other sites subject to the performance of routine maintenance and monitoring at those sites. Liquidated Damages The Company has entered into fixed-price contracts which, among other things, require completion of the specified scope of work within a defined period of time. Certain of those contracts provide for the assessment of liquidated damages if certain project milestones are not met in the contractually specified time unless a schedule extension is granted pursuant to the terms of the contract. At present, the Company does not believe the assessment of liquidated damages is likely. Nevertheless, the Company estimates the potential exposure to liquidated damages arising under those contracts could range from $0 to $4,000. Government Contracts The Company's indirect cost rates applied to contracts with the U.S. Government and various state agencies are subject to examination and renegotiation. Contracts and other records of the Company with respect to federal contracts have been examined through June 30, 2008. The Company believes that adjustments resulting from such examination or renegotiation proceedings, if any, will not likely have a material impact on the Company's business, operating results, financial position and cash flows. Legal Matters The Company and its subsidiaries are subject to claims and lawsuits typical of those filed against engineering and consulting companies. The Company carries liability insurance, including professional liability insurance, against such claims subject to certain deductibles and policy limits. Except as described herein, management is of the opinion that the resolution of these claims and lawsuits will not likely have a material effect on the Company's operating results, financial position and cash flows. In re: World Trade Center Lower Manhattan Disaster Site Litigation, United States District Court for the Southern District of New York, 2006. A subsidiary of the Company has been named as a defendant (along with a number of other defendants) in a number of cases which are pending in the United States District Court for the Southern District of New York and are styled under the caption "In Re World Trade Center Lower Manhattan Disaster Site Litigation." The Complaints allege that the plaintiffs were workers involved in construction, demolition, excavation, debris removal and clean-up in the buildings surrounding the World Trade Center site, allege that plaintiffs were injured and seek unspecified damages for those injuries. The Company believes the subsidiary has meritorious defenses and is adequately insured, however an adverse determination in this matter could have a material effect on the Company's business, financial condition, results of operations or cash flows. The Company records actual or potential litigation-related losses in accordance with ASC Topic 450. As of September 27, 2013 and June 30, 2013, the Company had recorded $4,726 and $3,612, respectively, of accruals for probable and estimable liabilities related to the litigation-related losses in which the Company was then involved. The Company also had insurance recovery receivables related to the aforementioned litigation-related accruals of $3,114 and $2,425 as of September 27, 2013 and June 30, 2013, respectively. The Company periodically adjusts the amount of such accruals when such actual or potential liabilities are paid or otherwise discharged, new claims arise, or additional relevant information about existing or potential claims becomes available. The Company believes that it is reasonably possible that the amount of potential litigation related liabilities could increase by as much as $3,000, of which $2,000 would be covered by insurance.

Commitments and Contingencies

Exit Strategy Contracts

The Company has entered into a number of long-term contracts pursuant to its Exit Strategy program under which it is obligated to complete the remediation of environmental conditions at covered sites. The Company assumes the risk for remediation costs for pre-existing site environmental conditions and believes that through in-depth technical analysis, comprehensive cost estimation and creative remedial approaches it is able to execute strategies which protect the Company's return on these projects. The Company's client pays a fixed price and, as additional protection, for a majority of the contracts the client also pays for a cleanup cost cap insurance policy. The policy, which includes the Company as a named or additional insured party, provides coverage for cost increases from unknown or changed conditions up to a specified maximum amount significantly in excess of the estimated cost of remediation. The Company believes that it is adequately protected from risk on these projects and that it is not likely that it will incur material losses in excess of applicable insurance. However, because three projects are near the term or financial limits of the insurance and one project may require a material change to the remedy proposed by the Company, the Company believes it is reasonably possible that events could occur under certain circumstances which could be material to the Company's condensed consolidated financial statements. With respect to these four projects, there is a wide range of potential outcomes that may result in costs being incurred beyond the limits or term of insurance, such as: (i) greater than expected volumes of contaminants requiring remediation; (ii) wastewater treatment systems requiring operation beyond the insurance term; and (iii) greater than expected allocable share of the ultimate remedy. The Company does not believe these outcomes are likely, and the exact nature, impact and duration of any such occurrence could vary due to a number of factors. Accordingly, the Company is unable to provide an estimate of loss with a reasonable degree of accuracy. Nevertheless, if these events were to occur, the Company believes that it is reasonably possible that the amount of costs currently accrued, which represents the Company's best estimate, could increase by as much as $25,000, of which $3,000 would be covered by insurance.

With respect to one of the projects noted above, the regulatory agency charged with oversight of the project issued a proposed remedial plan that is more expensive than the remedy proposed by the Company. A cost allocation among the potentially responsible parties has not been finalized. The Company's share of the potential remedial costs ranges from $0 to $18,000. However, the Company (and the party from whom it assumed site responsibility) did not contribute in any way to the site contamination, and the Company believes that it has meritorious defenses to liability and that it would not ultimately be responsible for any material remedial costs even if the more costly remedy is selected. Nevertheless, due to uncertainty over the cost allocation process, it is reasonably possible that the Company's recorded estimate could change. The Company adjusts recorded liabilities as further information develops or circumstances change. The Company is unable to accurately project the time period over which these amounts would ultimately be paid out, however the Company estimates that any potential payments could be made over a 2 to 5 year period.

Certain Exit Strategy contracts entered into by the Company involved the Company entering into consent decrees with government authorities and assuming the obligation for the settling responsible parties' statutory environmental remediation liability at the sites. The Company's expected remediation costs for the aforementioned contracts (included within current and long-term deferred revenue in the condensed consolidated balance sheets) are funded by the contract price and insured by the environmental remediation cost cap policy (current and long-term restricted investments in the condensed consolidated balance sheets). As of September 27, 2013, the remediation for five projects has been completed. Additionally, remediation has been substantially completed at three other sites subject to the performance of routine maintenance and monitoring at those sites.

Liquidated Damages

The Company has entered into fixed-price contracts which, among other things, require completion of the specified scope of work within a defined period of time. Certain of those contracts provide for the assessment of liquidated damages if certain project milestones are not met in the contractually specified time unless a schedule extension is granted pursuant to the terms of the contract. At present, the Company does not believe the assessment of liquidated damages is likely. Nevertheless, the Company estimates the potential exposure to liquidated damages arising under those contracts could range from $0 to $4,000.

Government Contracts

The Company's indirect cost rates applied to contracts with the U.S. Government and various state agencies are subject to examination and renegotiation. Contracts and other records of the Company with respect to federal contracts have been examined through June 30, 2008. The Company believes that adjustments resulting from such examination or renegotiation proceedings, if any, will not likely have a material impact on the Company's business, operating results, financial position and cash flows.

Legal Matters

The Company and its subsidiaries are subject to claims and lawsuits typical of those filed against engineering and consulting companies. The Company carries liability insurance, including professional liability insurance, against such claims subject to certain deductibles and policy limits. Except as described herein, management is of the opinion that the resolution of these claims and lawsuits will not likely have a material effect on the Company's operating results, financial position and cash flows.

In re: World Trade Center Lower Manhattan Disaster Site Litigation, United States District Court for the Southern District of New York, 2006. A subsidiary of the Company has been named as a defendant (along with a number of other defendants) in a number of cases which are pending in the United States District Court for the Southern District of New York and are styled under the caption "In Re World Trade Center Lower Manhattan Disaster Site Litigation." The Complaints allege that the plaintiffs were workers involved in construction, demolition, excavation, debris removal and clean-up in the buildings surrounding the World Trade Center site, allege that plaintiffs were injured and seek unspecified damages for those injuries. The Company believes the subsidiary has meritorious defenses and is adequately insured, however an adverse determination in this matter could have a material effect on the Company's business, financial condition, results of operations or cash flows.

The Company records actual or potential litigation-related losses in accordance with ASC Topic 450. As of September 27, 2013 and June 30, 2013, the Company had recorded $4,726 and $3,612, respectively, of accruals for probable and estimable liabilities related to the litigation-related losses in which the Company was then involved. The Company also had insurance recovery receivables related to the aforementioned litigation-related accruals of $3,114 and $2,425 as of September 27, 2013 and June 30, 2013, respectively.

The Company periodically adjusts the amount of such accruals when such actual or potential liabilities are paid or otherwise discharged, new claims arise, or additional relevant information about existing or potential claims becomes available. The Company believes that it is reasonably possible that the amount of potential litigation related liabilities could increase by as much as $3,000, of which $2,000 would be covered by insurance.