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Capital Stock and Changes in Capital Accounts - Share Repurchases (Details) - $ / shares shares in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2023 | Oct. 31, 2022 | Oct. 31, 2023 | Oct. 31, 2022
Class A common stock |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares repurchased (in shares) | 367 | 170 | 668 | 382
Treasury stock acquired (in dollars per share) | $ 33.97 | $ 44.24 | $ 33.64 | $ 45.84
Class B common stock |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Shares repurchased (in shares) | 1 | 0 | 1 | 0
Treasury stock acquired (in dollars per share) | $ 33.97 | $ 44.24 | $ 33.64 | $ 45.84

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