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Business Combinations - Pro Forma Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Combinations [Abstract]
Net revenue	$ 140,856	$ 118,821	$ 376,725	$ 321,382
Net income	5,898	2,851	8,685	3,541
Net income (loss) attributable to common stockholders	$ 5,898	$ 1,273	$ (11,212)	$ (1,056)
Net income (loss) per share attributable to common stockholders (basic and diluted)	$ 0.19	$ 0.06	$ (0.38)	$ (0.05)

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- Definition

Business Acquisition Pro Forma Earnings Per Share Basic And Diluted

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- Definition

Business Acquisitions Pro Forma Net Income Loss Attributable To Common Stockholders

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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=25497992&loc=d3e1392-128463

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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

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=25497992&loc=d3e1392-128463

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