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Schedule of Effective Tax Rates Vary from Federal Statutory Rates (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Income Tax Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Earnings from Continuing Operations Before Income Taxes | $ 90,214 | $ 131,846 | $ 131,315 | $ 121,719 | $ 79,442 | $ 105,072 | $ 109,671 | $ 129,927 | $ 475,094 | $ 424,112 | $ 255,695
Income Taxes at Statutory Rate |  |  |  |  |  |  |  |  | 99,770 | 89,063 | 53,998
State Income Taxes, net |  |  |  |  |  |  |  |  | 12,743 | 11,713 | 3,579
Statutory Depletion in Excess of Cost |  |  |  |  |  |  |  |  | (7,796) | (5,263) | (3,078)
Excess Tax Benefit from Stock Compensation |  |  |  |  |  |  |  |  | (3,048) | (3,229) | 307
Meals and Entertainment Disallowance |  |  |  |  |  |  |  |  | 279 | 220 | 537
Limitation on Officers' Compensation |  |  |  |  |  |  |  |  | 2,568 | 1,503 | 1,018
Impact of CARES Act of 2020 |  |  |  |  |  |  |  |  |  |  | (35,936)
Credits |  |  |  |  |  |  |  |  |  | (400) | (2,150)
Valuation Allowance |  |  |  |  |  |  |  |  | (4,556) | 300 | 2,212
Change in Reserves |  |  |  |  |  |  |  |  |  | (2,916) | 4,200
Other |  |  |  |  |  |  |  |  | 887 | (1,045) | (183)
Provision for Income Taxes |  |  |  |  |  |  |  |  | $ 100,847 | $ 89,946 | $ 24,504
Effective Tax Rate |  |  |  |  |  |  |  |  | 21.00% | 21.00% | 10.00%

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