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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 16.9	$ 9.9
Approximate rate on pre-tax income	39.00%	38.00%
U.S. federal statutory rate	35.00%

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 13



-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319



Reference 2: http://www.xbrl.org/2003/role/presentationRef



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-Name Accounting Standards Codification



-Topic 235



-SubTopic 10



-Section S99



-Paragraph 1



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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 740



-SubTopic 10



-Section 50



-Paragraph 9



-Subparagraph (a),(b)



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Reference 2: http://www.xbrl.org/2003/role/presentationRef



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-Name Accounting Standards Codification



-Topic 235



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-Section S99



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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690



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