Commitments and Contingencies	9 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies From time to time, the Company is a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract, property damage, punitive damages, civil penalties or other losses, or injunctive or declaratory relief. With respect to such lawsuits, the Company accrues reserves when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any other proceedings, individually or in the aggregate, would be expected to have a material adverse effect on results of operations, cash flows or financial condition. A pending legal matter was settled for a $5.5 million and $0.5 million, respectively, during the first quarter of 2018. Settlement amounts were recorded in "Other gain from continuing operations" in the Consolidated Statements of Operations, "Prepaid expenses and other" (current portion of the notes receivable) and "Other non-current assets" (non-current portion of the notes receivable) in the Consolidated Balance Sheets. As of September 30, 2018, the current portion of the note receivable was $0.8 million and the non-current portion was $3.8 million. Legal fees related to this matter were expensed as incurred during the respective reporting period. As a result of charges brought in September 2015 and October 2016 by the Houston Police Department, Environmental Enforcement, two subsidiaries of the Company were recently indicted by a duly organized Grand Jury of Harris County, Texas for separate but related violations of the Texas Water Code, allegedly arising from the handling of construction concrete at certain work sites. Specifically, both were charged with unlawfully, intentionally or knowingly discharging a waste or pollutant. The Company is subject to a maximum fine in each case of $250,000, but has already declined a $7,500 plea bargain in the first case. In the second case, a project supervisor was also indicted. None of these allegations nor the costs of defense, taken separately or as a whole, is expected to be material to the Company. The Company considers all of these allegations without merit and it will vigorously defend itself and its employee.

Commitments and Contingencies

From time to time, the Company is a party to various lawsuits, claims and other legal proceedings that arise in the ordinary course of business. These actions typically seek, among other things, compensation for alleged personal injury, breach of contract, property damage, punitive damages, civil penalties or other losses, or injunctive or declaratory relief. With respect to such lawsuits, the Company accrues reserves when it is probable a liability has been incurred and the amount of loss can be reasonably estimated. The Company does not believe any other proceedings, individually or in the aggregate, would be expected to have a material adverse effect on results of operations, cash flows or financial condition.

A pending legal matter was settled for a $5.5 million and $0.5 million, respectively, during the first quarter of 2018. Settlement amounts were recorded in "Other gain from continuing operations" in the Consolidated Statements of Operations, "Prepaid expenses and other" (current portion of the notes receivable) and "Other non-current assets" (non-current portion of the notes receivable) in the Consolidated Balance Sheets. As of September 30, 2018, the current portion of the note receivable was $0.8 million and the non-current portion was $3.8 million. Legal fees related to this matter were expensed as incurred during the respective reporting period.

As a result of charges brought in September 2015 and October 2016 by the Houston Police Department, Environmental Enforcement, two subsidiaries of the Company were recently indicted by a duly organized Grand Jury of Harris County, Texas for separate but related violations of the Texas Water Code, allegedly arising from the handling of construction concrete at certain work sites. Specifically, both were charged with unlawfully, intentionally or knowingly discharging a waste or pollutant. The Company is subject to a maximum fine in each case of $250,000, but has already declined a $7,500 plea bargain in the first case. In the second case, a project supervisor was also indicted. None of these allegations nor the costs of defense, taken separately or as a whole, is expected to be material to the Company. The Company considers all of these allegations without merit and it will vigorously defend itself and its employee.