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Schedule of Components of Deferred Income Taxes (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022
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Income Tax Disclosure [Abstract] |  |
Excess Tax Depreciation and Amortization | $ (253,541) | $ (242,335)
Investment in Joint Venture Basis Differences | (8,744) | (7,813)
Depletable Assets | (3,876) | (3,769)
Right of Use Assets | (5,202) | (5,897)
Inventory | (406) | (548)
Other | (2,908) | (3,506)
Total Deferred Tax Liabilities | (274,677) | (263,868)
Change in Accruals | 12,886 | 13,255
Bad Debts | 1,662 | 1,600
Long-term Incentive Compensation Plan | 3,515 | 3,252
Credits and Other Carryforwards | 12,995 | 12,747
Lease Liability | 7,647 | 8,849
Pension | 1,128 | 1,001
Subtotal | 39,833 | 40,704
Valuation Allowance | (2,000) | (9,205)
Total Deferred Tax Assets | $ 37,833 | $ 31,499

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