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Summary of Selected Financial Information of the Company on a Pro Forma Basis (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Business Acquisition Pro Forma Information [Abstract] |  |  |  |
Revenues | $ 684,989 | $ 326,227 | $ 1,811,903 | $ 1,082,554
Net loss | $ (27,627) | $ (117,185) | $ (189,098) | $ (346,481)
Loss per share | $ (0.13) | $ (0.56) | $ (0.89) | $ (1.65)

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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=79982066&loc=d3e1392-128463 + Details
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