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Acquisitions - Unaudited Supplemental Pro Forma Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Combinations [Abstract]
Revenues	$ 3,034,191	$ 3,510,941	$ 8,412,036	$ 9,580,086
Gross profit	509,532	507,299	1,220,824	1,278,843
Selling, general and administrative expenses	(251,664)	(260,223)	(725,732)	(754,625)
Amortization of intangible assets	(20,526)	(22,765)	(62,793)	(67,044)
Net income	163,687	142,272	279,654	307,513
Net income attributable to common stock	$ 162,900	$ 141,318	$ 275,201	$ 304,897
Earnings per share:
Basic (in dollars per share)	$ 1.16	$ 0.96	$ 1.93	$ 2.08
Diluted (in dollars per share)	$ 1.13	$ 0.95	$ 1.89	$ 2.06

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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