Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	May 31, 2020	Sep. 30, 2019
Revenues:
Revenues	$ 38,998	$ 146,398	$ 50,161	$ 142,370	$ 445,809
Costs and expenses:
Operating costs	28,893	108,059	37,636	114,047	332,614
Depreciation and amortization	14,699	22,924	19,935	35,647	68,428
General and administrative	11,626	30,485	15,839	22,047	68,271
Pre-petition restructuring charges			0	16,822	0
Impairment			388	17,853	1,378
Bad debt expense (recovery), net	(315)	196	(598)	1,209	(90)
Gain on dispositions of property and equipment, net	(3,829)	17	(4,289)	(989)	(2,184)
Total costs and expenses	51,074	161,681	68,911	206,636	468,417
Loss from operations	(12,076)	(15,283)	(18,750)	(64,266)	(22,608)
Other income (expense):
Interest expense, net of interest capitalized	(6,253)	(10,013)	(8,468)	(12,294)	(30,003)
Reorganization Items, net	(2,522)	0	(3,666)	(21,903)	0
Loss on extinguishment of debt			0	(4,215)	0
Other income (expense), net	(848)	(588)	(1,078)	(3,333)	445
Total other expense, net	(9,623)	(10,601)	(13,212)	(41,745)	(29,558)
Loss before income taxes	(21,699)	(25,884)	(31,962)	(106,011)	(52,166)
Income tax (expense) benefit	1,629	(132)	2,075	1,786	(1,909)
Net income (loss)	$ (20,070)	$ (26,016)	$ (29,887)	$ (104,225)	$ (54,075)
Loss per common share - Basic	$ (17.94)	$ (0.33)	$ (27.15)	$ (1.32)	$ (0.69)
Loss per common share - Diluted	$ (17.94)	$ (0.33)	$ (27.15)	$ (1.32)	$ (0.69)
Weighted average number of shares outstanding - Basic	1,119	78,473	1,101	78,968	78,405
Weighted average number of shares outstanding - Diluted	1,119	78,473	1,101	78,968	78,405