Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
REVENUES	$ 468,266	$ 508,522	$ 1,432,008	$ 1,482,880
EXPENSES:
Operating	347,927	368,735	1,063,169	1,060,246
General and administrative	35,883	32,038	97,307	94,847
Depreciation and amortization	37,865	36,654	114,436	107,768
Contingent consideration for acquisition of businesses	620		620
Asset impairments	805		13,058	4,706
Costs and Expenses, Total	423,100	437,427	1,288,590	1,267,567
OPERATING INCOME	45,166	71,095	143,418	215,313
OTHER (INCOME) EXPENSE:
Interest expense, net	20,193	20,975	63,727	63,073
Other (income) expense	(2,113)	(360)	(5,633)	(614)
Total non-operating expense (income)	18,080	20,615	58,094	62,459
INCOME BEFORE INCOME TAXES	27,086	50,480	85,324	152,854
Income tax expense	(369)	(1,486)	(3,183)	(5,942)
NET INCOME	26,717	48,994	82,141	146,912
Net income attributable to non-controlling interest			(1,181)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ 26,717	$ 48,994	$ 80,960	$ 146,912
BASIC EARNINGS PER SHARE	$ 0.22	$ 0.41	$ 0.68	$ 1.23
DILUTED EARNINGS PER SHARE	$ 0.22	$ 0.41	$ 0.68	$ 1.23