Chapter 11 Cases and Subsequent Events Debtor Condensed Combined Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Entity Information [Line Items]
Revenues	$ 114,322	$ 146,568
Operating costs	92,022	108,585
Depreciation	21,984	22,653
General and administrative	14,655	19,758
Pre-petition restructuring charges	17,074	0
Impairment	17,853	1,046
Bad debt expense, net	727	62
Gain on dispositions of property and equipment, net	(717)	(1,075)
Intercompany leasing	0	0
Total costs and expenses	163,598	151,029
Loss from operations	(49,276)	(4,461)
Equity in losses of subsidiaries	0	0
Interest expense, net of interest capitalized	(8,651)	(9,885)
Reorganization Items	(6,663)	0
Other income (expense), net	(5,545)	684
Total other expense, net	(20,859)	(9,201)
Loss before income taxes	(70,135)	(13,662)
Income tax (expense) benefit	1,031	(1,453)
Net loss	(69,104)	$ (15,115)
Debtor Entities in Bankruptcy [Member]
Entity Information [Line Items]
Revenues	99,867
Operating costs	79,885
Depreciation	20,683
General and administrative	14,155
Pre-petition restructuring charges	17,074
Impairment	17,853
Bad debt expense, net	727
Gain on dispositions of property and equipment, net	(717)
Intercompany leasing	(1,215)
Total costs and expenses	148,445
Loss from operations	(48,578)
Equity in losses of subsidiaries	(31,726)
Interest expense, net of interest capitalized	(8,668)
Reorganization Items	(6,663)
Other income (expense), net	197
Total other expense, net	(46,860)
Loss before income taxes	(95,438)
Income tax (expense) benefit	1,116
Net loss	$ (94,322)