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Schedule I - Condensed Financial Information of AMERCO (Balance Sheets) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
ASSETS: |  |  |  |
Cash and cash equivalents | $ 1,194,012 | $ 494,352 | $ 673,701 | $ 759,388
Investments in subsidiaries | 0 | 0 |  |
Related party assets | 35,395 | 34,784 |  |
Total assets | 14,651,606 | 13,438,024 | 11,891,713 |
Liabilities: |  |  |  |
Other Liabilities | 9,799,724 | 9,217,304 |  |
Stockholders' equity: |  |  |  |
Additional paid-in capital | 453,819 | 453,819 |  |
Accumulated other comprehensive loss | 106,857 | 34,652 |  |
Consolidated statement of change in equity |  |  |  |
Beginning of period | 4,399,402 |  |  |
Adjustment for adoption of ASU 2016-13 | (2,880) |  |  |
Net earnings | 610,856 | 442,048 | 370,857 |
End of period | 4,958,359 | 4,399,402 |  |
Total stockholders' equity | 4,851,882 | 4,220,720 |  |
Total liabilities and stockholders' equity | 14,651,606 | 13,438,024 |  |
Common Stock in Treasury [Member] |  |  |  |
Consolidated statement of change in equity |  |  |  |
Cost of shares in treasury | (525,653) | (525,653) |  |
Preferred Stock in Treasury [Member] |  |  |  |
Consolidated statement of change in equity |  |  |  |
Cost of shares in treasury | (151,997) | (151,997) |  |
Amerco [Member] |  |  |  |
ASSETS: |  |  |  |
Cash and cash equivalents | 751,053 | 294,528 | 428,950 | $ 469,209
Investments in subsidiaries | 3,284,760 | 2,758,509 |  |
Related party assets | 1,535,355 | 1,734,358 |  |
Other assets | 413,167 | 502,064 |  |
Total assets | 5,984,335 | 5,289,459 |  |
Liabilities: |  |  |  |
Other Liabilities | 1,136,742 | 1,068,291 |  |
Stockholders' equity: |  |  |  |
Preferred stock | 0 | 0 |  |
Common stock | 10,497 | 10,497 |  |
Additional paid-in capital | 454,029 | 454,029 |  |
Accumulated other comprehensive loss | 102,568 | 35,100 |  |
Consolidated statement of change in equity |  |  |  |
Beginning of period | 4,399,192 | 3,976,752 |  |
Adjustment for adoption of ASU 2016-13 | (2,880) | 0 |  |
Net earnings | 610,856 | 442,048 | 370,857 |
Dividends | (49,019) | (19,608) |  |
End of period | 4,958,149 | 4,399,192 | $ 3,976,752 |
Total stockholders' equity | 4,847,593 | 4,221,168 |  |
Total liabilities and stockholders' equity | 5,984,335 | 5,289,459 |  |
Amerco [Member] | Common Stock in Treasury [Member] |  |  |  |
Consolidated statement of change in equity |  |  |  |
Cost of shares in treasury | (525,653) | (525,653) |  |
Amerco [Member] | Preferred Stock in Treasury [Member] |  |  |  |
Consolidated statement of change in equity |  |  |  |
Cost of shares in treasury | $ (151,997) | $ (151,997) |  |

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