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Acquisitions - Unaudited Supplemental ProForma Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
Business Combinations [Abstract] |  |
Revenues | $ 1,721,043 | $ 1,919,685
Gross profit | 203,465 | 249,172
Selling, general and administrative expenses | 159,209 | 152,008
Amortization of intangible assets | 7,650 | 9,736
Net income from continuing operations | 20,397 | 54,529
Net income from continuing operations attributable to common stock | $ 20,034 | $ 49,828
Earnings per share from continuing operations attributable to common stock - basic and diluted | $ 0.12 | $ 0.23

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- Definition The pro forma amortization of intangible assets for a period as if the business combination or combinations had been completed at the beginning of the period. + References No definition available. + Details
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- Definition The pro forma gross profit for a period as if the business combination or combinations had been completed at the beginning of the period. + References No definition available. + Details
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- Definition The pro forma net income(loss) attributable to common stock for a period as if the business combination or combinations had been completed at the beginning of the period. + References No definition available. + Details
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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