Condensed Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Revenues	$ 146,398	$ 149,332	$ 445,809	$ 448,592
Costs and expenses:
Operating costs	108,059	108,961	332,614	325,924
Depreciation	22,924	23,501	68,428	70,535
General and administrative	30,485	14,043	68,271	58,066
Bad debt expense (recovery), net	196	111	(90)	(311)
Impairment	0	239	1,378	2,607
Loss (gain) on dispositions of property and equipment, net	17	(1,861)	(2,184)	(2,922)
Total costs and expenses	161,681	144,994	468,417	453,899
Income (loss) from operations	(15,283)	4,338	(22,608)	(5,307)
Other income (expense):
Interest expense, net of interest capitalized	(10,013)	(9,811)	(30,003)	(28,966)
Other income (expense), net	(588)	498	445	1,046
Total other expense, net	(10,601)	(9,313)	(29,558)	(27,920)
Loss before income taxes	(25,884)	(4,975)	(52,166)	(33,227)
Income tax expense	(132)	(258)	(1,909)	(1,297)
Net loss	$ (26,016)	$ (5,233)	$ (54,075)	$ (34,524)
Loss per common share - Basic	$ (0.33)	$ (0.07)	$ (0.69)	$ (0.44)
Loss per common share - Diluted	$ (0.33)	$ (0.07)	$ (0.69)	$ (0.44)
Weighted average number of shares outstanding - Basic	78,473	78,136	78,405	77,897
Weighted average number of shares outstanding - Diluted	78,473	78,136	78,405	77,897