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Schedule I - Condensed Financial Information of AMERCO (Balance Sheets) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
ASSETS: |  |  |  |
Cash and cash equivalents | $ 2,704,137 | $ 1,194,012 | $ 494,352 | $ 673,701
Investments in subsidiaries | 0 | 0 |  |
Related party assets | 47,851 | 35,395 |  |
Total assets | 17,299,581 | 14,651,606 | 13,438,024 |
Liabilities: |  |  |  |
Other Liabilities | 11,414,298 | 9,799,724 |  |
Stockholders' equity: |  |  |  |
Additional paid-in capital | 453,819 | 453,819 |  |
Accumulated other comprehensive loss | 46,384 | 106,857 |  |
Consolidated statement of change in equity |  |  |  |
Beginning of period | 4,958,359 |  |  |
Adjustment for adoption of ASU 2016-13 |  | (2,880) |  |
Net earnings | 1,123,286 | 610,856 | 442,048 |
End of period | 6,052,233 | 4,958,359 |  |
Total stockholders' equity | 5,885,283 | 4,851,882 |  |
Total liabilities and stockholders' equity | 17,299,581 | 14,651,606 |  |
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 | 2,085,447 | 751,053 | 294,528 | $ 428,950
Investments in subsidiaries | 4,240,811 | 3,284,760 |  |
Related party assets | 1,821,654 | 1,535,355 |  |
Other assets | 178,691 | 413,167 |  |
Total assets | 8,326,603 | 5,984,335 |  |
Liabilities: |  |  |  |
Other Liabilities | 2,442,517 | 1,136,742 |  |
Stockholders' equity: |  |  |  |
Preferred stock | 0 | 0 |  |
Common stock | 10,497 | 10,497 |  |
Additional paid-in capital | 454,029 | 454,029 |  |
Accumulated other comprehensive loss | 45,187 | 102,568 |  |
Consolidated statement of change in equity |  |  |  |
Beginning of period | 4,958,149 | 4,399,192 |  |
Adjustment for adoption of ASU 2016-13 | 0 | (2,880) |  |
Net earnings | 1,123,286 | 610,856 | 442,048 |
Dividends | (29,412) | (49,019) |  |
End of period | 6,052,023 | 4,958,149 | $ 4,399,192 |
Total stockholders' equity | 5,884,086 | 4,847,593 |  |
Total liabilities and stockholders' equity | 8,326,603 | 5,984,335 |  |
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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- Definition The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29,30) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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