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INCOME TAXES (Tables) | 12 Months Ended
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Mar. 31, 2019
Income Tax Disclosure [Abstract] |
Schedule of Components of Provision for Income Taxes | The provision for income taxes includes the following components:
|  | For the Years Ended March 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (dollars in thousands) |
Current Provision (Benefit) - |  |  |  |  |  |  |  |  |  |  |  |
Federal |  | $ | 32,710 |  |  | $ | 58,695 |  |  | $ | 86,459 |
State |  |  | 6,536 |  |  |  | 5,989 |  |  |  | 7,638 |
|  |  | 39,246 |  |  |  | 64,684 |  |  |  | 94,097 |
Deferred Provision (Benefit) - |  |  |  |  |  |  |  |  |  |  |  |
Federal |  |  | (21,039 | ) |  |  | (52,333 | ) |  |  | 7,274 |
State |  |  | (7,332 | ) |  |  | 2,979 |  |  |  | (5,071 | )
|  |  | (28,371 | ) |  |  | (49,354 | ) |  |  | 2,203 |
Provision for Income Taxes |  | $ | 10,875 |  |  | $ | 15,330 |  |  | $ | 96,300 |
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, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | (dollars in thousands) |
Earnings Before Income Taxes |  | $ | 79,735 |  |  | $ | 271,962 |  |  | $ | 294,519 |
Income Taxes at Statutory Rate |  | $ | 16,744 |  |  | $ | 85,804 |  |  | $ | 103,082 |
Increases (Decreases) in Tax Resulting from - |  |  |  |  |  |  |  |  |  |  |  |
State Income Taxes, net |  |  | (629 | ) |  |  | 6,139 |  |  |  | 1,668 |
Statutory Depletion in Excess of Cost |  |  | (3,834 | ) |  |  | (6,341 | ) |  |  | (1,216 | )
Domestic Production Activities Deduction |  |  | — |  |  |  | (5,995 | ) |  |  | (7,615 | )
Excess Tax Benefit from Stock Compensation |  |  | (651 | ) |  |  | (4,129 | ) |  |  | — |
Meals and Entertainment Disallowance |  |  | 610 |  |  |  | 567 |  |  |  | 626 |
Limitation on Officer's Compensation |  |  | 1,434 |  |  |  | 246 |  |  |  | — |
Impact of Tax Cuts and Jobs Act of 2017 |  |  | — |  |  |  | (61,692 | ) |  |  | — |
Credits |  |  | (940 | ) |  |  | — |  |  |  | — |
Valuation Allowance |  |  | (2,100 | ) |  |  | — |  |  |  | — |
Other |  |  | 241 |  |  |  | 731 |  |  |  | (245 | )
Provision for Income Taxes |  | $ | 10,875 |  |  | $ | 15,330 |  |  | $ | 96,300 |
Effective Tax Rate |  |  | 14 | % |  |  | 6 | % |  |  | 33 | %
Schedule of Components of Deferred Income Taxes | Components of deferred income taxes are as follows:
|  | March 31, |
|  | 2019 |  |  | 2018 |
|  | (dollars in thousands) |
Items Giving Rise to Deferred Tax Liabilities - |  |  |  |  |  |  |  |
Excess Tax Depreciation and Amortization |  | $ | (108,505 | ) |  | $ | (106,367 | )
Depletion |  |  | — |  |  |  | (11,069 | )
State Income Taxes, net |  |  | (9,236 | ) |  |  | (14,265 | )
Other |  |  | (5,628 | ) |  |  | (5,957 | )
Total Deferred Tax Liabilities |  | $ | (123,369 | ) |  | $ | (137,658 | )
Items Giving Rise to Deferred Tax Assets - |  |  |  |  |  |  |  |
Change in Accruals |  | $ | 8,601 |  |  | $ | 8,965 |
Depletable Assets |  |  | 8,995 |  |  |  | — |
Inventory |  |  | 6,046 |  |  |  | 4,276 |
Bad Debts |  |  | 2,169 |  |  |  | 1,891 |
Long-term Incentive Compensation Plan |  |  | 5,154 |  |  |  | 4,616 |
Credits and Other Carryforwards |  |  | 12,289 |  |  |  | 12,879 |
Pension |  |  | 921 |  |  |  | 1,108 |
Subtotal |  |  | 44,175 |  |  |  | 33,735 |
Valuation Allowance |  |  | (11,565 | ) |  |  | (15,043 | )
Total Deferred Tax Assets |  | $ | 32,610 |  |  | $ | 18,692 |

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