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Acquisitions - Unaudited Supplemental Pro Forma Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Business Acquisition [Line Items] |  |
Revenues | $ 2,178,170 | $ 1,713,737
Gross profit | 266,188 | 203,313
Selling, general and administrative expenses | 184,552 | 158,524
Amortization of intangible assets | 6,562 | 7,495
Net income | 48,440 | 20,859
Net income attributable to common stock | $ 48,267 | $ 20,496
Earnings per share attributable to common stock - basic and diluted | $ 0.31 | $ 0.13
Pro Forma [Member] | Acquisitions [Member] |  |
Business Acquisition [Line Items] |  |
Revenues |  | $ 1,730,177
Gross profit |  | 205,205
Selling, general and administrative expenses |  | 160,230
Amortization of intangible assets |  | 7,824
Net income |  | 20,757
Net income attributable to common stock |  | $ 20,394
Earnings per share attributable to common stock - basic and diluted |  | $ 0.13

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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
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