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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2014 USD ($)
Accounting Policies [Abstract]
Reclassification of noncurrent taxes payable to assets under noncurrent deferred income taxes	$ 15,000

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- References

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- Definition

The amount of a reclassification adjustment made to prior period financial statement amounts.

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