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Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - Retained Earnings [Member] - $ / shares
12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Common stock dividends, per share   $ 1 $ 1.5
Non-voting common stock dividend per share declared $ 0.18 $ 0.08