Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 258,024,000	$ 188,006,000
Accounts receivable, net of allowance for doubtful accounts of $585 and $24,629 at September 30, 2021 and December 31, 2020, respectively	174,065,000	158,516,000
Income taxes receivable	0	8,891,000
Prepaid expenses	26,881,000	31,793,000
Inventory	71,684,000	77,027,000
Other current assets	6,946,000	9,171,000
Investment in equity securities	18,684,000	0
Assets held for sale	87,922,000	242,104,000
Total current assets	644,206,000	715,508,000
Property, plant and equipment, net	403,473,000	408,107,000
Operating lease right-of-use assets	28,871,000	33,317,000
Goodwill	0	138,677,000
Notes receivable	75,564,000	72,129,000
Restricted cash	79,560,000	80,178,000
Intangible and other long-term assets, net	24,109,000	53,163,000
Total assets	1,255,783,000	1,501,079,000
Current liabilities:
Accounts payable	56,500,000	50,330,000
Accrued expenses	109,054,000	114,777,000
Liabilities held for sale	23,241,000	46,376,000
Total current liabilities	188,795,000	211,483,000
Decommissioning liabilities	173,132,000	134,436,000
Operating lease liabilities	20,608,000	29,464,000
Deferred income taxes	32,396,000	5,288,000
Other long-term liabilities	70,355,000	123,261,000
Total non-current liabilities	296,491,000	292,449,000
Liabilities subject to compromise	0	1,335,794,000
Total liabilities	485,286,000	1,839,726,000
Stockholders’ equity (deficit):
Common stock	0	16,000
Predecessor Treasury stock at cost, 972,412 shares at December 31, 2020	0	(4,290,000)
Accumulated other comprehensive loss, net	0	(67,947,000)
Accumulated deficit	(132,830,000)	(3,023,315,000)
Total stockholders’ equity (deficit)	770,497,000	(338,647,000)
Total liabilities and stockholders’ equity (deficit)	1,255,783,000	1,501,079,000
Common Class A [Member]
Stockholders’ equity (deficit):
Common stock	200,000	0
Additional paid-in capital	902,486,000	2,756,889,000
Common Class B [Member]
Stockholders’ equity (deficit):
Common stock	1,000	0
Additional paid-in capital	$ 640,000	$ 0