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Revenue (Tables) | 6 Months Ended
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Jun. 30, 2024
Revenue |
Schedule of revenue by discipline | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Six months ended
​ | ​ | June 30, | ​ | June 30,
​ | ​ | 2024 | ​ | 2023 | ​ | 2024 | ​ | 2023
​ | ​ | (in thousands)
Systems | ​ | $ | 198,645 | ​ | $ | 215,174 | ​ | $ | 394,076 | ​ | $ | 410,372
Aftermarket | ​ | ​ | 57,867 | ​ | ​ | 58,796 | ​ | ​ | 114,807 | ​ | ​ | 117,618
Total Revenue | ​ | $ | 256,512 | ​ | $ | 273,970 | ​ | $ | 508,883 | ​ | $ | 527,990
Schedule of revenue by geographic markets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Six months ended
​ | ​ | June 30, | ​ | June 30,
​ | ​ | 2024 | ​ | 2023 | ​ | 2024 | ​ | 2023
​ | ​ | (in thousands)
North America | ​ | $ | 34,373 | ​ | $ | 37,918 | ​ | $ | 79,876 | ​ | $ | 83,084
Asia Pacific | ​ | ​ | 196,159 | ​ | ​ | 205,941 | ​ | ​ | 384,376 | ​ | ​ | 397,044
Europe | ​ | ​ | 25,980 | ​ | ​ | 30,111 | ​ | ​ | 44,631 | ​ | ​ | 47,862
Total Revenue | ​ | $ | 256,512 | ​ | $ | 273,970 | ​ | $ | 508,883 | ​ | $ | 527,990
Schedule of Contract liabilities | ​

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