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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 2,207,000	$ (119,125,000)	$ 34,206,000	$ (81,522,000)
Effective tax rate	5.90%	(222.50%)	20.00%	(41.00%)
Unrecognized tax benefits	34,800,000		34,800,000
Interest related to unrecognized tax benefit			1,700,000
Tax reserves on uncertain tax positions	700,000		2,300,000
Uncertain tax provision reserves	1,700,000		1,700,000
Additional interest expense on uncertain tax positions	$ 0		$ 500,000

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

This element represents interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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