Summary of Significant Accounting Policies Summary of Significant Accounting Policies, Revenue Recognition (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue	$ 4,143,143	$ 3,511,509	$ 3,230,785
Gross profit	1,303,614	976,827	760,580
Costs of revenue	(2,839,529)	(2,534,682)	(2,470,205)
Corporate general and administrative expenses	(138,107)	(141,066)	(126,886)
Gains on divestitures and impairment charges, net	25,169	7,009	32,919
Operating income	1,190,676	842,770	666,613
Interest expense	(150,610)	(163,063)	(185,843)
Losses on early extinguishment of debt, net	(5,226)	(18,428)	(16,637)
Nonoperating Income (Expense)	10,660	781	299
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,045,500	662,060	464,432
Income Tax Expense (Benefit)	(242,248)	(145,923)	(94,661)
Net income	803,252	516,137	369,771
Net income attributable to noncontrolling interests	(313)	(230)	(175)
Net income attributable to common stockholders	$ 802,939	$ 515,907	$ 369,596
Net income attributable to common stockholders, basic	$ 4.79	$ 2.92	$ 2.03
Net income attributable to common stockholders, diluted	$ 4.72	$ 2.88	$ 1.99
Change in amounts due for unfulfilled performance obligations	$ (87,207)	$ (55,269)	$ (10,223)