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Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings and Government Investigations The Company is periodically involved in lawsuits, investigations and claims that arise in the ordinary course of business. While the Company cannot predict with certainty the ultimate resolution of lawsuits, investigations and claims asserted against it, the Company does not believe that any currently pending or threatened legal proceeding to which the Company is or is likely to become a party will have a material adverse effect on its business, results of operations, cash flows or financial condition. The costs incurred by the Company to defend lawsuits, investigations and claims and amounts the Company pays to other parties because of these matters may be covered by insurance in some circumstances. Litigation and Commercial Claims A subsidiary of the Company, Mistras Arizona Inspection Services LLC (“Mistras Arizona”) is subject to a lawsuit filed by the Arizona Department of Environmental Quality (“DEQ”), which has been filed against the Company, captioned State of Arizona v. Mistras Group, Inc. and Naiman Phoenix, Ltd., filed on February 27, 2024, in the Superior Court of the State of Arizona for Maricopa County, CV 2024-003866. The Complaint alleges various violations of the Arizona environmental laws and regulations in connection with the operation of the Mistras Arizona testing facility in Phoenix, Arizona. The complaint seeks injunctive relief, the closing of a chromic acid plating line and air scrubber, implementation of a site assessment plan approved by the DEQ, corrective and remedial action to bring the facility in compliance, and costs and penalties. Mistras Arizona and the Company have also received notice of violations from the DEQ for the violations of Arizona environmental laws and regulations and from the Maricopa County Department of Air Quality for violation of various regulations regarding air quality. This matter is in the early stages and the Company is unable to assess the amount of liability the Company or Mistras Arizona may incur. Pension Related Contingencies Certain of the Company’s subsidiaries had significant reductions in their unionized workers in 2018. The collective bargaining agreements for the employees of these subsidiaries required contributions for these employees to two national multi-employer pension funds. The reduction in employees resulted in one of the Company's subsidiaries incurring a complete withdrawal to one of the pension funds under the Employee Retirement Income Security Act of 1974 ("ERISA"), which was fully satisfied in 2019. The Company has determined that the subsidiary is likely to incur partial or complete withdrawal liability to the other pension fund. The balance of the estimated total amount of this potential liability as of March 31, 2024 is approximately $2.5 million, which were incurred in 2018 and 2019.