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10-Q Earnings per share - Schedule of Earnings per share reconciliation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Earnings Per Share [Abstract]                  
Net income (loss) $ 56,836 $ (41,320) $ 38,562 $ (40,010) $ 15,516 $ (1,448) $ 116,220 $ 129,755 $ 147,325
Weighted average common shares outstanding – basic (in shares) 56,566   56,566   56,566 56,566 56,566 56,566 56,566
Effect of dilutive restricted stock units (in shares) 33   0   17 0      
Diluted (in shares) 56,599   56,566   56,583 56,566      
Shares excluded from the calculation of diluted earnings per share (in shares) 0   0   0 0      
Net income (loss) per share – basic (in dollars per share) $ 1.00   $ 0.68   $ 0.27 $ (0.03) $ 2.05 $ 2.29 $ 2.60
Net income (loss) per share - diluted (in dollars per share) $ 1.00   $ 0.68   $ 0.27 $ (0.03)