Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Product Information [Line Items]
Revenue	$ 1,077,981	$ 802,965
Costs of revenue	(700,474)	(623,921)
Gross profit	377,507	179,044
Corporate general and administrative expenses	(36,733)	(31,813)
Gains on divestitures and impairment charges, net	1,266	4,545
Operating income	342,040	151,776
Interest expense	(35,812)	(44,351)
Losses on early extinguishment of debt, net	0	(139)
Other income (expense), net	341	(1,247)
Income before income taxes	306,569	106,039
(Provision for) benefit from income taxes	(77,614)	(24,038)
Net income	228,955	82,001
Net income attributable to noncontrolling interests	(76)	(60)
Net income attributable to common stockholders	$ 228,879	$ 81,941
Basic earnings per share:
Net income attributable to common stockholders, basic	$ 1.35	$ 0.45
Basic weighted average number of shares	169,918	180,854
Diluted earnings per share:
Net income attributable to common stockholders, diluted	$ 1.33	$ 0.45
Diluted weighted average number of shares	172,367	183,585
Dividends declared per share	$ 210	$ 190
Product [Member]
Product Information [Line Items]
Revenue	$ 554,591	$ 377,883
Costs of revenue	(251,692)	(196,448)
Service [Member]
Product Information [Line Items]
Revenue	463,859	367,528
Costs of revenue	(202,978)	(197,524)
Product and Service, Other [Member]
Product Information [Line Items]
Revenue	59,531	57,554
Costs of revenue	$ (245,804)	$ (229,949)