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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |
Earnings for basic computations | $ 600,740 | $ 269,656 | $ 463,626
Earnings for diluted computations | $ 600,750 | $ 269,657 | $ 463,635
Weighted-average common stock shares outstanding, basic (in shares) | 130,366,501 | 132,161,646 | 134,134,034
Dilutive stock options and restricted stock (in shares) | 449,402 | 554,790 | 716,774
Weighted-average common stock shares outstanding, diluted (in shares) | 130,815,903 | 132,716,436 | 134,850,808
Earnings per share of common share: |  |  |
Basic (in dollars per share) | $ 4.61 | $ 2.04 | $ 3.46
Diluted (in dollars per share) | $ 4.59 | $ 2.03 | $ 3.44
Cash dividends paid | $ 253,413 | $ 235,726 | $ 209,057
Restricted Stock and Other Awards |  |  |
Earnings per share of common share: |  |  |
Unvested shares participating in the payment of the company's dividends declared (in shares) | 1,100,000 | 1,100,000 | 900,000
Cash dividends paid | $ 2,100 | $ 1,800 | $ 1,400
Undistributed earnings (loss) allocated to participating securities, basic | 2,900 | 300 | 1,700
Undistributed earnings (loss) allocated to participating securities, diluted | $ 2,900 | $ 300 | $ 1,700

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