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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Operating Activities:    
Net income $ 121,201 $ 193,214
Noncash items included in net income:    
Depreciation and amortization 121,589 101,385
Deferred income taxes 17,474 4,084
Other, net 13,216 10,669
Changes in operating assets and liabilities:    
Accounts receivable (27,886) (66,063)
Accounts payable 10,996 11,438
Change in other assets and liabilities, net 23,225 (17,485)
Net cash provided by operating activities 279,815 237,242
Investing Activities:    
Acquisition of property and equipment (377,540) (681,919)
Proceeds from disposal of property and equipment 1,967 643
Other (8,394) 4,999
Net cash used in investing activities (383,967) (676,277)
Financing Activities:    
Repayments of revolving credit facility (633,000) (489,100)
Borrowings of revolving credit facility 746,000 556,100
Borrowings on private shelf agreement 0 100,000
Proceeds from stock option exercises 2,463 1,993
Shares withheld for taxes (7,744) (7,968)
Repayment of finance leases (4,203) (6,813)
Other financing activity 0 (223)
Net cash provided by financing activities 103,516 153,989
Net Decrease in Cash and Cash Equivalents (636) (285,046)
Cash and Cash Equivalents, beginning of period 19,473 296,215
Cash and Cash Equivalents, end of period $ 18,837 $ 11,169