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Schedule I - Condensed Financial Information Of AMERCO (Statements of Comprehensive Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Net earnings | $ 442,048 | $ 370,857 | $ 790,583
Amerco [Member] |  |  |
Net earnings | 442,048 | 370,857 | 790,583
Other comprehensive income (loss) | 101,350 | (62,075) | 37,873
Total comprehensive income | $ 543,398 | $ 308,782 | $ 828,456

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