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STATEMENT OF CASH FLOWS- Schedule of property, plant and equipment and intangibles (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Net cash flows from      
Purchases of property, plant and equipment $ 795,787 $ 780,538 $ 597,103
Additions associated with maintenance 337,126 486,231 302,858
Other additions 458,661 294,307 294,245
Purchases of intangible assets 68,052 50,116 88,518
Other additions $ 68,052 $ 50,116 $ 88,518