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Stock Repurchase Program - Additional Information (Detail)	Apr. 30, 2014
Stock Repurchase Program [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	0
Board Of Directors
Stock Repurchase Program [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	500,000

X

- Details

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Period Type:	duration

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Period Type:	instant