Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	May 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Revenues	$ 142,370	$ 103,874	$ 575,792
Costs and expenses:
Operating costs	114,047	78,198	431,353
Depreciation and amortization	35,647	33,613	90,884
General and administrative	22,047	24,055	91,185
Prepetition restructuring charges	16,822	0	0
Impairment	17,853	742	2,667
Bad debt expense (recovery), net	1,209	(227)	(79)
Gain on dispositions of property and equipment, net	(989)	(6,132)	(4,513)
Total costs and expenses	206,636	130,249	611,497
Loss from operations	(64,266)	(26,375)	(35,705)
Other income (expense):
Interest expense, net of interest capitalized	(12,294)	(14,831)	(39,835)
Reorganization items, net	(21,903)	(4,263)	0
Loss on extinguishment of debt	(4,215)	(188)	0
Other income (expense), net	(3,333)	2,617	2,307
Total other expense, net	(41,745)	(16,665)	(37,528)
Loss before income taxes	(106,011)	(43,040)	(73,233)
Income tax benefit	1,786	2,816	9,329
Net income (loss)	$ (104,225)	$ (40,224)	$ (63,904)
Loss per common share - Basic	$ (1.32)	$ (36.01)	$ (0.81)
Loss per common share - Diluted	$ (1.32)	$ (36.01)	$ (0.81)
Weighted average number of shares outstanding - Basic	78,968	1,117	78,423
Weighted average number of shares outstanding - Diluted	78,968	1,117	78,423