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Pro-forma Results of Acquisitions (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Business Acquisition, Pro Forma Information [Line Items]    
Revenue $ 168,837 $ 204,351
Income from operations 25,920 71,003
Net income $ 15,982 $ 45,371
Net income per share, basic $ 0.22 $ 0.57
Net income per share, diluted $ 0.21 $ 0.55