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Stock Repurchase Program - Additional Information (Detail) - USD ($) $ in Millions | Jul. 01, 2017 | Sep. 01, 2015
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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 |

X
- 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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Balance Type: | na
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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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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
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