Commitments and Contingencies	6 Months Ended
Jun. 30, 2013
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Government Contracts As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties and compensatory and treble damages, and possible suspension or debarment from doing business with the government. Based on currently available information, we believe the outcome of ongoing government disputes and investigations will not have a material impact on our financial position, results of operations or liquidity. Legal Matters In December 2011, we received a letter from a gasket supplier that it had supplied us with gaskets from a Canadian manufacturer that, contrary to our supplier's product specifications and purchase orders, may contain asbestos material. Additionally, the supplier has informed us that one of its customers had found that certain gaskets manufactured by the Canadian company tested positive for asbestos during a routine audit. However, our supplier also informed us that industry experts have advised it no action is necessary to remove or replace any of these gaskets manufactured by the Canadian company that may have been installed by us inasmuch as any asbestos material in the gaskets is fully encapsulated in the gasket binding and enclosed within piping systems. No reasonable estimate of our ultimate liability is possible at this time, and based on our current knowledge, we do not expect that any amounts that we may incur as a consequence of our installation of these gaskets will have a material adverse effect on our financial position, results of operations or liquidity. To the extent we incur any expenditures related to this matter, we intend to seek reimbursement from the supplier. One of our subsidiaries was a subcontractor to a mechanical contractor ("Mechanical Contractor") on a construction project where an explosion occurred. An investigation of the matter could not determine who was responsible for the explosion. As a result of the explosion, lawsuits have been commenced against various parties, but, to date, no lawsuits have been commenced against our subsidiary with respect to personal injury or damage to property as a consequence of the explosion. However, the Mechanical Contractor has asserted claims, in the context of an arbitration proceeding against our subsidiary, alleging that our subsidiary is responsible for a portion of the damages for which the Mechanical Contractor may be liable as a result of: (a) losses asserted by the owner of the project and/or the owner's general contractor because of delays in completion of the project and damages to its property, (b) personal injury suffered by individuals as a result of the explosion and (c) the Mechanical Contractor's legal fees in defending against any and all such claims. We believe, and have been advised by counsel, that we have a number of meritorious defenses to all such matters. We believe that the ultimate outcome of such matters will not have a material adverse effect on our consolidated financial position, results of operations or liquidity. Notwithstanding our assessment of the final impact of this matter, we are not able to estimate with any certainty the amount of loss, if any, which would be associated with an adverse resolution. We are involved in several proceedings in which damages and claims have been asserted against us. Other potential claims may exist that have not yet been asserted against us. We believe that we have a number of valid defenses to such proceedings and claims and intend to vigorously defend ourselves. We do not believe that any such matters will have a material adverse effect on our financial position, results of operations or liquidity. Litigation is subject to many uncertainties and the outcome of litigation is not predictable with assurance. It is possible that some litigation matters for which reserves have not been established could be decided unfavorably to us, and that any such unfavorable decisions could have a material adverse effect on our financial position, results of operations or liquidity. Restructuring expenses Restructuring expenses were $5.8 million and $7.2 million for the three and six months ended June 30, 2013, respectively, which primarily related to employee severance obligations and the termination of leased facilities in the construction operations of our United Kingdom construction and facilities services segment. Restructuring expenses for the three months ended June 30, 2013 included $5.2 million of employee severance obligations and $0.6 million relating to the termination of leased facilities. Restructuring expenses for the six months ended June 30, 2013 included $6.6 million of employee severance obligations and $0.6 million relating to the termination of leased facilities. The majority of these restructuring expenses were as a result of our decision to withdraw from the construction market in the United Kingdom during the quarter ended June 30, 2013, due to recurring losses over the last several years in the construction operations of our United Kingdom segment and our negative assessment of construction market conditions in the United Kingdom for the foreseeable future. There were no restructuring expenses for the three and six months ended June 30, 2012. As of June 30, 2013, the balance of obligations yet to be paid was $3.8 million, the majority of which is expected to be paid in 2013. We expect to incur an additional $3.5 million of expenses in connection with this restructuring through 2014.

Commitments and Contingencies

Government Contracts

As a government contractor, we are subject to U.S. government audits and investigations relating to our operations, including claims for fines, penalties and compensatory and treble damages, and possible suspension or debarment from doing business with the government. Based on currently available information, we believe the outcome of ongoing government disputes and investigations will not have a material impact on our financial position, results of operations or liquidity.

Legal Matters

In December 2011, we received a letter from a gasket supplier that it had supplied us with gaskets from a Canadian manufacturer that, contrary to our supplier's product specifications and purchase orders, may contain asbestos material. Additionally, the supplier has informed us that one of its customers had found that certain gaskets manufactured by the Canadian company tested positive for asbestos during a routine audit. However, our supplier also informed us that industry experts have advised it no action is necessary to remove or replace any of these gaskets manufactured by the Canadian company that may have been installed by us inasmuch as any asbestos material in the gaskets is fully encapsulated in the gasket binding and enclosed within piping systems. No reasonable estimate of our ultimate liability is possible at this time, and based on our current knowledge, we do not expect that any amounts that we may incur as a consequence of our installation of these gaskets will have a material adverse effect on our financial position, results of operations or liquidity. To the extent we incur any expenditures related to this matter, we intend to seek reimbursement from the supplier.

One of our subsidiaries was a subcontractor to a mechanical contractor ("Mechanical Contractor") on a construction project where an explosion occurred. An investigation of the matter could not determine who was responsible for the explosion. As a result of the explosion, lawsuits have been commenced against various parties, but, to date, no lawsuits have been commenced against our subsidiary with respect to personal injury or damage to property as a consequence of the explosion. However, the Mechanical Contractor has asserted claims, in the context of an arbitration proceeding against our subsidiary, alleging that our subsidiary is responsible for a portion of the damages for which the Mechanical Contractor may be liable as a result of: (a) losses asserted by the owner of the project and/or the owner's general contractor because of delays in completion of the project and damages to its property, (b) personal injury suffered by individuals as a result of the explosion and (c) the Mechanical Contractor's legal fees in defending against any and all such claims. We believe, and have been advised by counsel, that we have a number of meritorious defenses to all such matters. We believe that the ultimate outcome of such matters will not have a material adverse effect on our consolidated financial position, results of operations or liquidity. Notwithstanding our assessment of the final impact of this matter, we are not able to estimate with any certainty the amount of loss, if any, which would be associated with an adverse resolution.

We are involved in several proceedings in which damages and claims have been asserted against us. Other potential claims may exist that have not yet been asserted against us. We believe that we have a number of valid defenses to such proceedings and claims and intend to vigorously defend ourselves. We do not believe that any such matters will have a material adverse effect on our financial position, results of operations or liquidity. Litigation is subject to many uncertainties and the outcome of litigation is not predictable with assurance. It is possible that some litigation matters for which reserves have not been established could be decided unfavorably to us, and that any such unfavorable decisions could have a material adverse effect on our financial position, results of operations or liquidity.

Restructuring expenses

Restructuring expenses were $5.8 million and $7.2 million for the three and six months ended June 30, 2013, respectively, which primarily related to employee severance obligations and the termination of leased facilities in the construction operations of our United Kingdom construction and facilities services segment. Restructuring expenses for the three months ended June 30, 2013 included $5.2 million of employee severance obligations and $0.6 million relating to the termination of leased facilities. Restructuring expenses for the six months ended June 30, 2013 included $6.6 million of employee severance obligations and $0.6 million relating to the termination of leased facilities. The majority of these restructuring expenses were as a result of our decision to withdraw from the construction market in the United Kingdom during the quarter ended June 30, 2013, due to recurring losses over the last several years in the construction operations of our United Kingdom segment and our negative assessment of construction market conditions in the United Kingdom for the foreseeable future. There were no restructuring expenses for the three and six months ended June 30, 2012. As of June 30, 2013, the balance of obligations yet to be paid was $3.8 million, the majority of which is expected to be paid in 2013. We expect to incur an additional $3.5 million of expenses in connection with this restructuring through 2014.