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Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Significant Accounting Policies |
Schedule of carrying amount of goodwill by reportable segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Years Ended December 31, |  | 2022 |  | 2021
(in thousands) | ​ |  | ​ | ​ |  | ​
Technical Services | ​ | $ | 30,992 | ​ | $ | 30,992
Support Services | ​ |  | 1,158 | ​ |  | 1,158
Goodwill | ​ | $ | 32,150 | ​ | $ | 32,150
​
Schedule of reconciliation of weighted average shares outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(in thousands) | ​ | 2022 |  | 2021 |  | 2020
Net income (loss) available for stockholders: | ​ | $ | 218,363 | ​ | $ | 7,217 | ​ | $ | (212,192)
Less: Adjustments for earnings attributable to participating securities | ​ | ​ | (3,197) | ​ | ​ | (89) | ​ | ​ | —
Net income (loss) used in calculating earnings per share | ​ | $ | 215,166 | ​ | $ | 7,128 | ​ | $ | (212,192)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average shares outstanding (including participating securities) | ​ |  | 216,518 | ​ |  | 215,646 | ​ |  | 215,063
Adjustment for participating securities | ​ |  | (3,187) | ​ |  | (2,656) | ​ |  | (2,571)
Shares used in calculating basic and diluted earnings per share | ​ |  | 213,331 | ​ |  | 212,990 | ​ |  | 212,492
​

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