Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating activities:
Net income (loss)	$ 246,012	$ (56,283)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation	55,812	52,645
Gain on disposition of assets	(3,146)	(4,729)
Deferred tax provision	(200,658)	(3,276)
Stock-based compensation expense	8,082	12,658
Contract liabilities, net	(2,707)	(20,870)
Contract assets, net	(1,980)	(3,348)
Deferred contract costs, net	4,893	(3,859)
Collateral deposits	0	17,464
Other assets, noncurrent	2,577	(443)
Other liabilities, noncurrent	16,870	428
Other	1,501	842
Changes in operating assets and liabilities:
Accounts receivable	(25,996)	(5,039)
Prepaid expenses and other current assets	(6,122)	(9,417)
Current income tax assets	(85,266)	0
Accounts payable and accrued liabilities	3,965	28,832
Taxes payable	(3,094)	(16,410)
Net cash provided by (used in) operating activities	10,743	(10,805)
Investing activities:
Capital expenditures	(58,953)	(32,353)
Proceeds from disposition of assets, net of disposal costs	348	5,788
Net cash used in investing activities	(58,605)	(26,565)
Financing activities:
Borrowings under revolving credit facility	20,000	40,000
Repayments under revolving credit facility	(15,000)	0
Principal payments of finance lease liabilities	(10,503)	(7,735)
Net cash (used in) provided by financing activities	(5,503)	32,265
Net change in cash, cash equivalents and restricted cash	(53,365)	(5,105)
Cash, cash equivalents and restricted cash, beginning of period	97,334	62,729
Cash, cash equivalents and restricted cash, end of period	$ 43,969	$ 57,624