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Pro-forma Results of Acquisitions (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013
Business Acquisition, Pro Forma Information [Line Items] |  |  |  |
Revenue | $ 188,693 | $ 158,356 | $ 618,743 | $ 443,820
Income from operations | 47,396 | 46,384 | 199,380 | 126,291
Net income | $ 29,173 | $ 28,622 | $ 122,316 | $ 75,092
Net income per share, basic | $ 0.40 | $ 0.36 | $ 1.61 | $ 0.92
Net income per share, diluted | $ 0.38 | $ 0.35 | $ 1.56 | $ 0.90

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