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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Non-Cash Investing and Financing Activities:    
Property and equipment accrued but unpaid $ 244,163 $ 210,204
Right-of-use assets acquired in exchange for finance lease obligations 77,715 78,564
Costs relating to financing transactions accrued but unpaid 2,083 1,644
Distributions to parent 20,408 115,187
Supplemental Data:    
Cash interest paid 586,176 673,222
Income taxes paid, net 107,026 28,406
Notes payable issued to vendor for the purchase of equipment and other assets $ 33,818 $ 11,582