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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 67,990 $ (21,043)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 103,687 78,973
Impairment expense 0 57,454
Deferred income tax expense 18,897 (4,321)
Amortization of deferred debt issuance costs 140 655
Stock-based compensation 7,294 14,822
Loss on disposal of assets 25,145 22,947
Unrealized loss on short-term investment 3,846 0
Changes in operating assets and liabilities:    
Accounts receivable (35,178) (53,878)
Other current assets (983) 561
Inventories (6,792) 457
Prepaid expenses (144) 3,343
Accounts payable (3,160) (426)
Accrued and other current liabilities 5,769 3,764
Increase (Decrease) in Interest Payable, Net 503 0
Net cash provided by operating activities 187,014 103,308
CASH FLOWS FROM INVESTING ACTIVITIES:    
Capital expenditures (223,775) (144,519)
Proceeds from sale of assets 2,044 2,951
Net cash used in investing activities (221,731) (141,568)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from borrowings 30,000 0
Payment of debt issuance costs (1,179) (824)
Proceeds from exercise of equity awards 0 741
Tax withholdings paid for net settlement of equity awards (3,383) (3,786)
Share repurchases (17,470) 0
Net cash provided by (used in) financing activities 7,968 (3,869)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH (26,749) (42,129)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - Beginning of period 88,862 111,918
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - End of period 62,113 69,789
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:    
Capital expenditures included in accounts payable and accrued liabilities 71,080 53,108
Summary of cash, cash equivalents and restricted cash    
Cash, cash equivalents and restricted cash 49,890 69,789
Restricted cash 12,223 0
Total cash, cash equivalents and restricted cash — End of period $ 62,113 $ 69,789