Revenue - Revenue by discipline & geographical areas (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue
Total Revenue	$ 221,177	$ 147,274	$ 424,772	$ 280,050
North America
Disaggregation of Revenue
Total Revenue	34,683	10,204	59,596	19,712
Asia Pacific
Disaggregation of Revenue
Total Revenue	168,705	116,642	317,945	220,033
Europe
Disaggregation of Revenue
Total Revenue	17,789	20,428	47,231	40,305
Systems
Disaggregation of Revenue
Total Revenue	165,350	100,138	317,152	181,129
Aftermarket
Disaggregation of Revenue
Total Revenue	$ 55,827	$ 47,136	$ 107,620	$ 98,921