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Common Stock and Dividends (Details) - USD ($) |  |  |  |  | 1 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 31, 2023 | Feb. 28, 2023 | Feb. 21, 2023 | Feb. 28, 2022 | Apr. 30, 2009
Common Stock and Dividends |  |  |  |  |
Cash dividends paid to common shareholders (in dollars per share) |  | $ 0.63 |  | $ 0.60 |
Repurchase of common stock, authorized amount |  |  | $ 124,000,000 |  | $ 40,000,000
Period of repurchase of common stock |  |  | 12 months |  | 12 months
Cumulative number of shares repurchased under all stock repurchase programs | 13,692,792 |  |  |  |
Cumulative cost of shares repurchased under all stock repurchase programs | $ 414,222,000 |  |  |  |

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