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10-Q Business segment data - EBITDA reconciliation (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]              
EBITDA: $ 125,115 $ 87,318 $ 111,008 $ 69,126 $ 306,740 $ 293,406 $ 304,959
Depreciation, depletion and amortization 31,130 29,752 60,760 58,101 117,798 100,974 89,626
Interest Expense, Net 17,130 7,424 26,625 12,690      
Total consolidated income before income taxes 76,855 50,142 23,623 (1,665) 158,821 173,214 194,756
Operating Segments              
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]              
EBITDA: 119,769 83,145 99,680 69,048 297,316 285,066 277,626
All Other              
Segment, Reconciliation of Other Items from Segments to Consolidated [Line Items]              
EBITDA: $ 5,346 $ 4,173 $ 11,328 $ 78 $ 9,424 $ 8,340 $ 27,333