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UNAUDITED 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) $ 3,856 $ (3,828)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 31,967 29,135
Stock-based compensation expense, net of amount capitalized 6,320 5,528
Impairment expense 1,020 4,407
Deferred income taxes 2,491 (392)
Other, net 1,118 1,985
Changes in assets and liabilities:    
Accounts receivable 4,499 4,430
Current income taxes 25,108 0
Operating lease assets and liabilities, net 408 414
Other assets 1,937 (1,902)
Accounts payable (3,012) 127
Other deferrals and accruals (5,912) (1,180)
Net cash provided by operating activities 69,800 38,724
Cash flows from investing activities:    
Capital expenditures (136,158) (88,706)
Proceeds from sale of assets and other 508 279
Net cash used in investing activities (135,650) (88,427)
Cash flows from financing activities:    
Proceeds from credit facility borrowings 50,000 0
Payments for debt issuance costs (300) 0
Taxes paid for equity award issuances (1,317) (835)
Payments for financing arrangements and other (290) (471)
Net cash provided by (used in) financing activities 48,093 (1,306)
Net decrease in cash and cash equivalents (17,757) (51,009)
Cash and cash equivalents, beginning of period 44,061 84,344
Cash and cash equivalents, end of period 26,304 33,335
Supplemental Disclosures of Cash Flow Information    
Interest paid 3,111 0
Income tax refunds received, net $ 25,481 $ 0