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v3.22.1

Accounting Policies (Narratives) (Details) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Cash, Insured and Uninsured [Abstract] |  |  |
Cash, FDIC Insured Amount | $ 250,000 |  |
Cash, CDIC insured amount | $ 100,000 |  |
LIFO Method Related Items [Abstract] |  |  |
Percentage of LIFO inventory | 93.00% | 96.00% |
Inventory, LIFO reserve | $ 37,400,000 | $ 21,832,000 |
Effect of LIFO inventory liquidation on income | 100,000 |  |
Disposition of Property, Plant and Equipment |  |  |
Net amount of (gains) losses netted against depreciation expense | 214,200,000 | 54,100,000 | $ 27,100,000
Additional operating expenses | $ 28,700,000 | 22,800,000 | 26,900,000
Schedule of rental trucks depreciation: |  |  |
Percentage reduction for year one, depreciation | 16.00% |  |
Percentage reduction for year two, depreciation | 13.00% |  |
Percentage reduction for year three, depreciation | 11.00% |  |
Percentage reduction for year four, depreciation | 9.00% |  |
Percentage reduction for year five, depreciation | 8.00% |  |
Percentage reduction for year six, depreciation | 7.00% |  |
Percentage reduction for year seven, depreciation | 6.00% |  |
Salvage value percentage under the old declining balance method | 15.00% |  |
Percentage reduction if straight line approach used each year for depreciation calculation | 5.70% |  |
Real Estate Companies Disclosures [Abstract] |  |  |
Carrying value of surplus real estate | $ 67,800,000 | 68,800,000 |
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract] |  |  |
Self insurance reserve | 418,900,000 | 427,100,000 |
Accrued insurance, noncurrent | 19,700,000 | 17,500,000 |
Marketing and Advertising Expense [Abstract] |  |  |
Advertising expense | 13,700,000 | 18,000,000.0 | 13,700,000
Policyholder Benefits and Claims Incurred [Abstract] |  |  |
Deferred sales inducements, net | 15,700,000 | 16,000,000.0 |
Deferred sales inducements, amortization expense | 4,700,000 | 4,300,000 | 5,500,000
Adoption of New Accounting Pronounements |  |  |
Other components of net periodic benefit cost | 1,120,000 | 987,000 | $ 1,054,000
Operating lease commitment, asset | 620,824,000 | 877,038,000 |
Operating lease commitment, liability | 74,197,000 |  |
All Nonrental Equipment [Member] |  |  |
LIFO Method Related Items [Abstract] |  |  |
Inventory, LIFO reserve | $ 37,400,000 | $ 21,800,000 |

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