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Revenue - Revenue by discipline & geographical areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue
Total Revenue	$ 213,611	$ 256,564	$ 600,718	$ 765,448
North America
Disaggregation of Revenue
Total Revenue	29,161	32,950	103,909	112,826
Asia Pacific
Disaggregation of Revenue
Total Revenue	161,352	202,377	441,405	586,754
Europe
Disaggregation of Revenue
Total Revenue	23,098	21,237	55,404	65,868
Systems
Disaggregation of Revenue
Total Revenue	143,668	201,037	414,564	595,114
Aftermarket
Disaggregation of Revenue
Total Revenue	$ 69,943	$ 55,527	$ 186,154	$ 170,334

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