Stock Repurchase Program (Detail) - Repurchase Program April 2017 - USD ($) shares in Thousands	Mar. 31, 2019	Oct. 29, 2018
Equity, Class of Treasury Stock [Line Items]
Authorized common stock to be repurchased		$ 200,000,000
Number of shares repurchased	203
Value of shares repurchased	$ 8,622,000

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.

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