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Revenue - Revenue by discipline & geographical areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue
Total Revenue	$ 273,970	$ 221,177	$ 527,990	$ 424,772
North America
Disaggregation of Revenue
Total Revenue	37,918	34,683	83,084	59,596
Asia Pacific
Disaggregation of Revenue
Total Revenue	205,941	168,705	397,044	317,945
Europe
Disaggregation of Revenue
Total Revenue	30,111	17,789	47,862	47,231
Systems
Disaggregation of Revenue
Total Revenue	215,174	165,350	410,372	317,152
Aftermarket
Disaggregation of Revenue
Total Revenue	$ 58,796	$ 55,827	$ 117,618	$ 107,620

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