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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Income Taxes [Line Items]
Income tax expense	$ 9,895	$ 28,362
Approximate rate on pre-tax income	38.00%	34.00%
U.S. federal statutory rate	35.00%

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

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

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