Unaudited Condensed Consolidated Statement of Operations Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Unaudited Condensed Consolidated Statement of Operations [Abstract]
Revenue	$ 794,482	$ 777,710
Costs and expenses	(598,720)	(600,471)
Operating profit	195,762	177,239
General and administrative expenses	(34,784)	(42,283)
Gains on divestitures and impairment charges, net	482	4,935
Hurricane Expenses, Net of Insurance Proceeds	2,232	0
Operating income	163,692	139,891
Interest expense	(43,576)	(40,636)
Loss on early extinguishment of debt, net	(10,131)	0
Other income (expense), net	384	(729)
Income before income taxes	110,369	98,526
(Provision for) benefit from income taxes	(28,321)	76,223
Net Income	82,048	174,749
Net income attributable to noncontrolling interests	(60)	(47)
Net income attributable to common stockholders	$ 81,988	$ 174,702
Basic earnings per share:
Net income attributable to common stockholders, basic	$ 0.44	$ 0.93
Basic weighted average number of shares	185,130	188,260
Diluted earnings per share:
Net income attributable to common stockholders, diluted	$ 0.43	$ 0.91
Diluted weighted average number of shares	189,923	192,867
Dividends declared per share	$ 0.17	$ 0.13