Schedule of Components of Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Excess Tax Depreciation and Amortization	$ (242,335)	$ (242,235)
Investment in Joint Venture Basis Differences	(7,813)	(3,621)
Depletable Assets	(3,769)	(6,740)
Right of Use Assets	(5,897)	(6,506)
Inventory	548
Other	(3,506)	(2,913)
Total Deferred Tax Liabilities	(263,868)	(262,015)
Change in Accruals	13,255	13,859
Inventory		1,387
Bad Debts	1,600	2,022
Long-term Incentive Compensation Plan	3,252	3,940
Credits and Other Carryforwards	12,747	17,338
Lease Liability	8,849	10,141
Pension	1,001	1,103
Subtotal	40,704	49,790
Valuation Allowance	(9,205)	(13,761)
Total Deferred Tax Assets	$ 31,499	$ 36,029

Deferred tax assets, lease liability.

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Deferred tax liabilities, depletable assets.

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Deferred tax liabilities, right of use asset.

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible tax credit carryforwards, classified as other.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from compensation and benefits costs.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from pension benefits.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from allowance for credit loss on accounts receivable.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax consequences attributable to taxable temporary differences derived from inventory.

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Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments).

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Amount of deferred tax liability attributable to taxable temporary differences classified as other.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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