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Earnings Per Share and Cash Dividends - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
May 27, 2021 | Mar. 25, 2021 | Feb. 05, 2021 | Jul. 31, 2021 | Apr. 30, 2021 | Jul. 31, 2020 | Apr. 30, 2020 | Jul. 31, 2021 | Jul. 31, 2020
Earnings Per Share Diluted [Line Items] |  |  |  |  |  |  |  |  |
Dilutive common stock equivalents were excluded from the computation of diluted earnings per share |  |  |  | 365,000 |  | 960,000 |  | 319,000 | 921,000
Cash dividend declared and payable | $ 0.20 | $ 0.20 |  |  |  | $ 0 | $ 0 | $ 0.40 |
Dividend paid |  |  | $ 2,300 | $ 4,700 | $ 4,600 |  |  | $ 9,298 |
Dividend payable date |  |  |  | Jun. 23, 2021 | Apr. 21, 2021 |  |  |  |
Cash dividend paid per share |  |  | $ 0.10 |  |  |  |  |  |
Dividend payable, record date | Jun. 09, 2021 | Apr. 07, 2021 | Jan. 21, 2021 |  |  |  |  |  |
Stock Options |  |  |  |  |  |  |  |  |
Earnings Per Share Diluted [Line Items] |  |  |  |  |  |  |  |  |
Dilutive common stock equivalents were excluded from the computation of diluted earnings per share |  |  |  |  |  | 41,000 |  |  | 84,000

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