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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - Accounting Standards Update (ASU) 2016-09 [Member] $ in Millions	Feb. 01, 2016 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment of changes recognized in beginning of retained earnings	$ 11.5
Cumulative effect adjustment of changes recognized in beginning of retained earnings as a result of adoption of new guidance for tax benefits that were not previously recognized [Member]
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment of changes recognized in beginning of retained earnings	11.7
Cumulative effect adjustment of changes recognized in beginning of retained earnings as a result of adoption of new guidance for accounting for forfeitures as they occur [Member]
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment of changes recognized in beginning of retained earnings	$ (0.2)

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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