Commitments and Contingencies	9 Months Ended
Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Litigation The Company is involved in certain litigation incidental to the conduct of its business and affairs. Management, after consultation with legal counsel, does not believe that the outcome of any such litigation, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial condition, results of operations or cash flows. Contingencies In February 2016, the Company entered into a conditional agreement to settle an outstanding project dispute with a client in Infrastructure Solutions. As a result of the conditional settlement, the Company recorded a $2.7 million accrual as of December 31, 2015 in accordance with FASB ASC Subtopic No. 450-20, Contingencies - Loss Contingencies (“FASB ASC 450-20”). In March 2016, the Company entered into the final agreement and wrote off a $7.5 million customer receivable, along with the related allowance for doubtful account, as of March 31, 2016. The settlement amount was paid in April 2016. In connection with the Brinderson acquisition, certain pre-acquisition matters were identified in 2014 whereby a loss is both probable and reasonably estimable. The Company establishes liabilities in accordance with FASB ASC 450-20, and accordingly, recorded an accrual related to various legal, tax, employee benefit and employment matters. At December 31, 2015, the accrual related to these matters was $10.5 million. During the second quarter of 2016, the Company made payments totaling $0.4 million related to one of the above matters. Also during the second quarter of 2016, and based upon developments during the quarter and following consultation with internal and third-party legal counsel, the Company reassessed its reserve related to certain remaining matters and lowered its accrual for such matters by $1.8 million. During the third quarter of 2016, and based upon developments during the quarter and following consultation with internal and third-party legal and tax counsel, the Company reassessed its reserve related to certain remaining matters and lowered its accrual for such matters by $2.3 million. The accrual adjustments resulted in an offset to “Operating expense” in the Consolidated Statement of Operations. As of September 30, 2016, the remaining accrual relating to these matters was $6.0 million and represented the Company’s reasonable estimate of probable loss related to the Brinderson pre-acquisition matters. The Company believes it has asserted meritorious defenses to these remaining matters. Purchase Commitments The Company had no material purchase commitments at September 30, 2016. Guarantees The Company has many contracts that require the Company to indemnify the other party against loss from claims, including claims of patent or trademark infringement or other third party claims for injuries, damages or losses. The Company has agreed to indemnify its surety against losses from third-party claims of subcontractors. The Company has not previously experienced material losses under these provisions and, while there can be no assurances, currently does not anticipate any future material adverse impact on its consolidated financial position, results of operations or cash flows. The Company regularly reviews its exposure under all its engagements, including performance guarantees by contractual joint ventures and indemnification of its surety. As a result of the most recent review, the Company has determined that the risk of material loss is remote under these arrangements and has not recorded a liability for these risks at September 30, 2016 on its consolidated balance sheet.

COMMITMENTS AND CONTINGENCIES

Litigation

The Company is involved in certain litigation incidental to the conduct of its business and affairs. Management, after consultation with legal counsel, does not believe that the outcome of any such litigation, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial condition, results of operations or cash flows.

Contingencies

In February 2016, the Company entered into a conditional agreement to settle an outstanding project dispute with a client in Infrastructure Solutions. As a result of the conditional settlement, the Company recorded a $2.7 million accrual as of December 31, 2015 in accordance with FASB ASC Subtopic No. 450-20, Contingencies - Loss Contingencies (“FASB ASC 450-20”). In March 2016, the Company entered into the final agreement and wrote off a $7.5 million customer receivable, along with the related allowance for doubtful account, as of March 31, 2016. The settlement amount was paid in April 2016.

In connection with the Brinderson acquisition, certain pre-acquisition matters were identified in 2014 whereby a loss is both probable and reasonably estimable. The Company establishes liabilities in accordance with FASB ASC 450-20, and accordingly, recorded an accrual related to various legal, tax, employee benefit and employment matters. At December 31, 2015, the accrual related to these matters was $10.5 million. During the second quarter of 2016, the Company made payments totaling $0.4 million related to one of the above matters. Also during the second quarter of 2016, and based upon developments during the quarter and following consultation with internal and third-party legal counsel, the Company reassessed its reserve related to certain remaining matters and lowered its accrual for such matters by $1.8 million. During the third quarter of 2016, and based upon developments during the quarter and following consultation with internal and third-party legal and tax counsel, the Company reassessed its reserve related to certain remaining matters and lowered its accrual for such matters by $2.3 million. The accrual adjustments resulted in an offset to “Operating expense” in the Consolidated Statement of Operations. As of September 30, 2016, the remaining accrual relating to these matters was $6.0 million and represented the Company’s reasonable estimate of probable loss related to the Brinderson pre-acquisition matters. The Company believes it has asserted meritorious defenses to these remaining matters.

Purchase Commitments

The Company had no material purchase commitments at September 30, 2016.

Guarantees

The Company has many contracts that require the Company to indemnify the other party against loss from claims, including claims of patent or trademark infringement or other third party claims for injuries, damages or losses. The Company has agreed to indemnify its surety against losses from third-party claims of subcontractors. The Company has not previously experienced material losses under these provisions and, while there can be no assurances, currently does not anticipate any future material adverse impact on its consolidated financial position, results of operations or cash flows.

The Company regularly reviews its exposure under all its engagements, including performance guarantees by contractual joint ventures and indemnification of its surety. As a result of the most recent review, the Company has determined that the risk of material loss is remote under these arrangements and has not recorded a liability for these risks at September 30, 2016 on its consolidated balance sheet.