Shareholders' Equity - Additional Information (Details)	Oct. 31, 2018 USD ($)
2018 Share Repurchase Program [Member]
Equity Class Of Treasury Stock [Line Items]
Share Repurchase Program, Authorized Amount	$ 50,000,000

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.

No definition available.

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