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Business Combinations - Pro Forma Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] |  |
Net revenue | $ 304,790 | $ 275,530
Net income | $ 6,457 | $ 7,436
Basic net income per share | $ 0.20 | $ 0.24
Diluted net income per share | $ 0.20 | $ 0.23

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- Definition Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract] + References No definition available. + Details
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- Definition The pro forma basic net income per share for a 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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- Definition The pro forma diluted net income per share for a 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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