Acquisitions - Summary of Supplemental Pro Forma Consolidated Results of Operations (Detail) - Studer Group - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Combination, Separately Recognized Transactions [Line Items]
Revenues	$ 209,881	$ 218,409	$ 632,200	$ 674,118
Net income	$ 19,606	$ 10,173	$ 41,016	$ 60,988
Business Acquisition, Pro Forma Earnings Per Share, Basic	$ 0.89	$ 0.45	$ 1.85	$ 2.70
Business Acquisition, Pro Forma Earnings Per Share, Diluted	$ 0.87	$ 0.44	$ 1.81	$ 2.64

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.

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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