CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 289.7	$ 291.3	$ 576.9	$ 576.8
Costs and expenses:
Operating (excluding depreciation and amortization)	144.4	157.3	293.6	315.2
Selling, general and administrative	47.6	39.7	93.1	79.4
Depreciation and amortization	50.9	46.4	100.6	92.7
Impairment losses on intangibles and goodwill				216.3
Gain on sale of assets	(0.2)		(3.6)
Total costs and expenses	242.7	243.4	483.7	703.6
Income (loss) from operations	47.0	47.9	93.2	(126.8)
Other income (expense):
Interest expense	(36.0)	(32.7)	(71.6)	(61.8)
Other income, net	1.9	1.2	2.7	1.2
Income (loss) before provision for income tax	12.9	16.4	24.3	(187.4)
Income tax (expense) benefit	(3.5)	8.2	(6.7)	50.0
Net income (loss)	$ 9.4	$ 24.6	$ 17.6	$ (137.4)
Basic and diluted earnings (loss) per common shares
Basic (in dollars per share)	$ 0.12	$ 0.30	$ 0.22	$ (1.65)
Diluted (in dollars per share)	$ 0.12	$ 0.30	$ 0.22	$ (1.65)
Weighted-average common shares outstanding
Basic (in shares)	80,675,392	81,868,508	80,513,361	83,159,949
Diluted (in shares)	80,910,676	82,652,715	80,903,032	83,159,949