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Acquisitions - Unaudited Supplemental Pro Forma Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Business Combinations [Abstract] |  |
Revenues | $ 2,766,950 | $ 2,968,237
Gross profit | 333,402 | 397,098
Selling, general and administrative expenses | 231,102 | 243,857
Amortization of intangible assets | 18,067 | 22,212
Net income | 42,004 | 127,083
Net income attributable to common stock | $ 39,187 | $ 126,536
Earnings per share: |  |
Basic (in dollars per share) | $ 0.27 | $ 0.87
Diluted (in dollars per share) | $ 0.27 | $ 0.86

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