Unaudited Condensed Consolidated Statement of Operations Statement - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Product Information [Line Items]
Document Period End Date	Mar. 31, 2019
Revenue from External Customers	$ 798,212	$ 794,482
Costs and Expenses	(606,378)	(598,720)
Operating profit	191,834	195,762
General and administrative expenses	(42,530)	(34,784)
(Losses) gains on divestitures and impairment charges, net	(1,878)	482
Hurricane Expenses, Net of Insurance Proceeds	(448)	2,232
Operating income	146,978	163,692
Interest expense	(47,390)	(43,576)
Loss on early extinguishment of debt, net	0	(10,131)
Other income, net	720	384
Income before income taxes	100,308	110,369
Provision for income taxes	(21,095)	(28,321)
Net Income	79,213	82,048
Net income (loss) attributable to noncontrolling interests	110	(60)
Net income attributable to common stockholders	$ 79,323	$ 81,988
Basic earnings per share:
Net income attributable to common stockholders, basic	$ 0.44	$ 0.44
Basic weighted average number of shares	181,696	185,130
Diluted earnings per share:
Net income attributable to common stockholders, diluted	$ 0.43	$ 0.43
Diluted weighted average number of shares	185,317	189,923
Dividends declared per share	$ 0.18	$ 0.17
Product [Member]
Product Information [Line Items]
Revenue from External Customers	$ 381,209	$ 368,214
Costs and Expenses	(197,894)	(187,723)
Service [Member]
Product Information [Line Items]
Revenue from External Customers	355,371	378,098
Costs and Expenses	(190,813)	(190,848)
Product and Service, Other [Member]
Product Information [Line Items]
Revenue from External Customers	61,632	48,170
Costs and Expenses	$ (217,671)	$ (220,149)