REVENUE (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

A disaggregation of our revenue from contracts with customers by geographic region, by reportable operating segment and by service type is presented below (in thousands):

	Twelve Months Ended December 31, 2023
	United States and Canada		Other Countries		Total
Revenue:
IHT	$	414,515	$	15,044	$	429,559
MS	294,118		138,938		433,056
Total	$	708,633	$	153,982	$	862,615

	Twelve Months Ended December 31, 2022
	United States and Canada		Other Countries		Total
Revenue:
IHT	$	412,661	$	9,901	$	422,562
MS	296,151		121,495		417,646
Total	$	708,812	$	131,396	$	840,208

	Twelve Months Ended December 31, 2023
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	343,713	$	275	$	59,399	$	26,172	$	429,559
MS	—		429,480		702		2,874		433,056
Total	$	343,713	$	429,755	$	60,101	$	29,046	$	862,615

	Twelve Months Ended December 31, 2022
	Non-Destructive Evaluation and Testing Services		Repair and Maintenance Services		Heat Treating		Other		Total
Revenue:
IHT	$	336,821	$	180	$	61,526	$	24,035	$	422,562
MS	—		413,424		276		3,946		417,646
Total	$	336,821	$	413,604	$	61,802	$	27,981	$	840,208