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Revenue - Revenue by discipline & geographical areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue
Total Revenue	$ 215,175	$ 194,544	$ 414,131	$ 387,107
North America
Disaggregation of Revenue
Total Revenue	13,415	34,223	36,182	74,748
Asia Pacific
Disaggregation of Revenue
Total Revenue	177,873	145,628	322,291	280,053
Europe
Disaggregation of Revenue
Total Revenue	23,887	14,693	55,658	32,306
Systems
Disaggregation of Revenue
Total Revenue	132,374	133,288	258,700	270,897
Aftermarket
Disaggregation of Revenue
Total Revenue	$ 82,801	$ 61,256	$ 155,431	$ 116,210

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