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GOODWILL (Tables) | 9 Months Ended
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Sep. 30, 2023
GOODWILL |
Schedule of carrying amount of goodwill by reportable segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) | Technical Services |  | Support Services | ​ | Total
Beginning balance at January 1, 2023 | $ | 30,992 | ​ | $ | 1,158 |  | $ | 32,150
Business acquisition (see note 3) | ​ | 18,674 |  | ​ | — | ​ | ​ | 18,674
Ending balance at September 30, 2023 | $ | 49,666 | ​ | $ | 1,158 | ​ | $ | 50,824
​

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