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Business Combinations - Pro Forma Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] |  |  |  |
Net revenue | $ 285,346 | $ 255,626 | $ 548,299 | $ 492,239
Net income | $ 12,371 | $ 12,399 | $ 19,502 | $ 19,372
Basic and diluted net income per share | $ 0.39 | $ 0.39 | $ 0.62 | $ 0.61

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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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