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INCOME TAXES (Tables) | 12 Months Ended
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Mar. 31, 2025
Income Tax Disclosure [Abstract] |
Schedule of Components of Provision for Income Taxes | The provision for income taxes from continuing operations includes the following components:
|  | For the Years Ended March 31, |  |
|  | 2025 |  |  |  | 2024 |  |  |  | 2023 |  |
|  | (dollars in thousands) |  |
Current Provision |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ |  | 114,606 |  |  |  | $ |  | 111,690 |  |  |  | $ |  | 103,940 |  |
State |  |  |  | 18,411 |  |  |  |  |  | 20,689 |  |  |  |  |  | 18,520 |  |
|  |  |  | 133,017 |  |  |  |  |  | 132,379 |  |  |  |  |  | 122,460 |  |
Deferred Provision (Benefit) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  | (5,117 | ) |  |  |  |  | 5,607 |  |  |  |  |  | 11,321 |  |
State |  |  |  | 169 |  |  |  |  |  | 2,312 |  |  |  |  |  | (6,728 | ) |
|  |  |  | (4,948 | ) |  |  |  |  | 7,919 |  |  |  |  |  | 4,593 |  |
Provision for Income Taxes |  | $ |  | 128,069 |  |  |  | $ |  | 140,298 |  |  |  | $ |  | 127,053 |  |
Schedule of Effective Tax Rates Vary from Federal Statutory Rates | The effective tax rates vary from the federal statutory rates due to the following items:
|  | For the Years Ended March 31, |  |
|  | 2025 |  |  |  | 2024 |  |  |  | 2023 |  |
|  | (dollars in thousands) |  |
Earnings Before Income Taxes |  | $ |  | 591,485 |  |  |  | $ |  | 617,937 |  |  |  | $ |  | 588,593 |  |
Income Taxes at Statutory Rate |  | $ |  | 124,212 |  |  |  | $ |  | 129,766 |  |  |  | $ |  | 123,605 |  |
Increases (Decreases) in Tax Resulting From |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
State Income Taxes, net |  |  |  | 14,680 |  |  |  |  |  | 18,172 |  |  |  |  |  | 16,821 |  |
Statutory Depletion in Excess of Cost |  |  |  | (9,927 | ) |  |  |  |  | (9,883 | ) |  |  |  |  | (8,253 | ) |
Excess Tax Benefit from Stock Compensation |  |  |  | (3,951 | ) |  |  |  |  | (5,417 | ) |  |  |  |  | (1,593 | ) |
Meals and Entertainment Disallowance |  |  |  | 478 |  |  |  |  |  | 524 |  |  |  |  |  | 484 |  |
Limitation on Officers' Compensation |  |  |  | 4,843 |  |  |  |  |  | 6,513 |  |  |  |  |  | 3,009 |  |
Valuation Allowance |  |  |  | 500 |  |  |  |  |  | 500 |  |  |  |  |  | (7,205 | ) |
Other |  |  |  | (2,766 | ) |  |  |  |  | 123 |  |  |  |  |  | 185 |  |
Provision for Income Taxes |  | $ |  | 128,069 |  |  |  | $ |  | 140,298 |  |  |  | $ |  | 127,053 |  |
Effective Tax Rate |  |  |  | 22 | % |  |  |  |  | 23 | % |  |  |  |  | 22 | % |
Schedule of Components of Deferred Income Taxes | Components of deferred income taxes are as follows:
|  | For the Years Ended March 31, |  |
|  | 2025 |  |  |  | 2024 |  |
|  | (dollars in thousands) |  |
Items Giving Rise to Deferred Tax Liabilities |  |  |  |  |  |  |  |  |  |
Excess Tax Depreciation and Amortization |  | $ |  | (256,999 | ) |  |  | $ |  | (260,577 | ) |
Depletable Assets |  |  |  | (4,455 | ) |  |  |  |  | (4,294 | ) |
Investment in Joint Venture Basis Differences |  |  |  | (6,436 | ) |  |  |  |  | (7,710 | ) |
Right-of-Use Assets |  |  |  | (7,996 | ) |  |  |  |  | (4,774 | ) |
Inventory |  |  |  | (1,276 | ) |  |  |  |  | — |  |
Other |  |  |  | — |  |  |  |  |  | (2,956 | ) |
Total Deferred Tax Liabilities |  | $ |  | (277,162 | ) |  |  | $ |  | (280,311 | ) |
Items Giving Rise to Deferred Tax Assets |  |  |  |  |  |  |  |  |  |
Change in Accruals |  | $ |  | 12,866 |  |  |  | $ |  | 13,313 |  |
Bad Debts |  |  |  | 1,551 |  |  |  |  |  | 1,621 |  |
Long-term Incentive Compensation Plan |  |  |  | 4,609 |  |  |  |  |  | 3,622 |  |
Credits and Other Carryforwards |  |  |  | 9,905 |  |  |  |  |  | 11,466 |  |
Lease Liability |  |  |  | 9,303 |  |  |  |  |  | 6,598 |  |
Inventory |  |  |  | — |  |  |  |  |  | 307 |  |
Pension |  |  |  | 984 |  |  |  |  |  | 1,087 |  |
Other |  |  |  | 1,002 |  |  |  |  |  | — |  |
Subtotal |  |  |  | 40,220 |  |  |  |  |  | 38,014 |  |
Valuation Allowance |  |  |  | (3,000 | ) |  |  |  |  | (2,500 | ) |
Total Deferred Tax Assets |  | $ |  | 37,220 |  |  |  | $ |  | 35,514 |  |
Reconciliation of Consolidated Liability for Gross Unrecognized Tax Benefits | The changes in unrecognized tax benefits for the years ended March 31, 2025, 2024, and 2023 were as follows:
|  | For the Years Ended March 31, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (dollars in thousands) |
Balance at Beginning of Year |  | $ | 1,284 |  |  | $ | 1,284 |  |  | $ | 1,284 |
Increase Related to Current Tax Positions |  |  | — |  |  |  | — |  |  |  | — |
Decrease Related to Prior Year Tax Positions |  |  | (1,284 | ) |  |  | — |  |  |  | — |
Payments |  |  | — |  |  |  | — |  |  |  | — |
|  | $ | — |  |  | $ | 1,284 |  |  | $ | 1,284 |

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