Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Product Information [Line Items]
Revenue	$ 918,241	$ 769,241	$ 2,541,241	$ 2,380,025
Costs of revenue	(654,585)	(609,509)	(1,879,774)	(1,837,313)
Gross profit	263,656	159,732	661,467	542,712
Corporate general and administrative expenses	(40,986)	(29,668)	(109,968)	(101,864)
Gains on divestitures and impairment charges, net	(543)	1,479	(5,825)	15,180
Operating income	223,213	128,585	557,324	425,668
Interest expense	(40,721)	(46,678)	(126,839)	(141,385)
Losses on early extinguishment of debt, net	(18,278)	(9,058)	(18,428)	(16,637)
Other income (expense), net	629	20	548	1,614
Income before income taxes	164,843	72,869	412,605	269,260
(Provision for) benefit from income taxes	37,351	1,997	97,559	46,662
Net income	127,492	70,872	315,046	222,598
Net income attributable to noncontrolling interests	77	80	182	154
Net income attributable to common stockholders	$ 127,415	$ 70,792	$ 314,864	$ 222,444
Basic earnings per share:
Net income attributable to common stockholders, basic	$ 0.72	$ 0.39	$ 1.77	$ 1.22
Basic weighted average number of shares	175,982	182,551	178,238	182,218
Diluted earnings per share:
Net income attributable to common stockholders, diluted	$ 0.72	$ 0.38	$ 1.74	$ 1.20
Diluted weighted average number of shares	178,140	185,843	180,463	185,635
Dividends declared per share	$ 190	$ 180
Product [Member]
Product Information [Line Items]
Revenue	$ 479,521	$ 375,398	$ 1,272,000	$ 1,172,099
Costs of revenue	(230,568)	(197,544)	(634,118)	(609,073)
Service [Member]
Product Information [Line Items]
Revenue	382,466	332,838	1,104,793	1,027,299
Costs of revenue	(190,000)	(192,262)	(561,039)	(576,453)
Product and Service, Other [Member]
Product Information [Line Items]
Revenue	56,254	61,005	164,448	180,627
Costs of revenue	$ (234,017)	$ (219,703)	$ (684,617)	$ (651,787)