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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]    
Interest paid $ 155,358 $ 177,426
Income taxes paid 21,177 9,918
Right-of-use assets obtained in exchange for lease obligations:    
Finance leases 12,480 7,551
Operating leases 71,555 88,646
Capital expenditures acquired but not yet paid $ 176,907 $ 69,981