| Thousands of dollars, except per share data | Three Months Ended | | | | | --- | --- | --- | --- | --- | | | | March 31, 2024 | December 31, 2023 | | | Total revenues | | $274,610 |$ 297,637 | | | Operating income | | 21,813 | | 44,915 | | Net income (loss) | | 11,612 | | (145,702) | | Income (loss) per diluted share | | 0.11 | | (1.42) | | Adjusted operating income | | 31,813 | | 44,915 | | Adjusted EBITDA (1) | | 64,163 | | 72,340 | | Adjusted net income (loss) | | 25,434 | | (145,702) | | Adjusted in ...