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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash flows from operating activities:    
Net income (loss) $ 78,058 $ 118,785
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities    
Depreciation and amortization 152,323 147,634
Amortization of deferred financing costs and debt discount 4,777 8,188
Paid-in-kind interest on long-term debt   15,579
Impairment of assets held for sale and other investments   14,100
(Gain) loss on divestiture of businesses   3,837
Stock-based compensation expense 132,511 1,422
Liability classified stock awards   4,169
Loss (gain) on disposal of property and equipment 1,855 5,290
Unrealized loss (gain) on marketable equity securities 873 784
Deferred income taxes (8) (4)
Other, net (7,800) 3,645
Changes in assets and liabilities, net of effects of acquisitions    
Accounts receivable, net (71,555) (54,923)
Accounts payable 4,007 8,923
Accrued wages, benefits and taxes (62,806) (20,553)
Accrued interest (51,007) 27,138
Accrued liabilities 43,952 (60,027)
Other assets and liabilities, net (7,854) (5,314)
Net cash provided by (used in) operating activities 217,326 218,673
Cash flows from investing activities:    
Proceeds from divestiture of businesses   2,819
Proceeds from asset disposals related to sales and insurance recoveries 1,323 633
Purchases of property and equipment (137,989) (111,600)
Net change in investments held as insurance collateral (572) (1,857)
Purchases of marketable securities (64,563) (20,300)
Sales and maturities of marketable securities 60,678 25,956
Other investing activities, net 14,675 (3,347)
Net cash provided by (used in) investing activities (126,448) (107,696)
Cash flows from financing activities:    
Payments on finance lease obligations (6,401) (7,473)
Principal payments on long-term debt (750,351) (76,100)
Proceeds from issuance of long-term debt 73,037 77,026
Issuance of common stock, net 446,904  
Repurchase of common stock   (86)
Issuance of warrants to purchase common stock 500,000  
(Redemption) issuance of redeemable preferred stock (549,402)  
Proceeds from issuance of shares under stock award plan, net of cash taxes paid 72 499
Net cash provided by (used in) financing activities (286,141) (6,134)
(Decrease) increase in cash, cash equivalents, restricted cash and restricted cash equivalents (195,263) 104,843
Cash and cash equivalents, beginning of period (including restricted cash and restricted cash equivalents of $14.8 million and $16.6 million, respectively) 624,229 368,902
Cash and cash equivalents, end of period (including restricted cash and restricted cash equivalents of $[XX] million and $11.3 million, respectively) 428,966 473,745
Supplemental disclosure of cash flow information    
Equipment (primarily aircraft) additions financed with the issuance of debt 44,724 20,491
Interest 228,885 170,557
Income taxes, net of refunds received $ 38,757 $ 119,582