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Stock Repurchase Program - Additional Information (Detail) - USD ($) $ in Millions	Jul. 01, 2017	Sep. 01, 2015
Class of Stock [Line Items]
Number of common shares authorized to be repurchased under new stock repurchase program		5,000,000.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 2.9

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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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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Balance Type:	na
Period Type:	instant

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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