Business Combinations - Pro Forma Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Combination Increase Decrease To Reflect Liabilities Acquired At Fair Value [Abstract]
Net revenue	$ 226,329	$ 202,830	$ 642,343	$ 554,882
Net income attributable to common stockholders	$ 11,709	$ 10,211	$ 27,387	$ 19,353
Basic net income per share attributable to common stockholders	$ 0.37	$ 0.33	$ 0.88	$ 0.62
Diluted net income per share attributable to common stockholders	$ 0.37	$ 0.33	$ 0.87	$ 0.62

Business Acquisitions Pro Forma Net Income Loss Attributable To Common Stockholders.

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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=65885119&loc=d3e1392-128463

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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

+ Details

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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