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Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income | The following table shows the changes in accumulated other comprehensive loss, net of tax:
| Three Months Ended December 31, 2023 | Nine Months Ended December 31, 2023
| Post-retirement plans | Derivatives designated as cash flow hedges | Totals | Post-retirement plans | Derivatives designated as cash flow hedges | Totals
Beginning of period | $ | 18,684 |  | $ | 13,208 |  | $ | 31,892 |  | $ | 19,450 |  | $ | 9,883 |  | $ | 29,333 |
Other comprehensive income (loss) before reclassifications(1) | — |  | (3,165) |  | (3,165) |  | — |  | 5,535 |  | 5,535 |
Amounts reclassified from accumulated other comprehensive income | (383) |  | (2,841) |  | (3,224) |  | (1,149) |  | (8,216) |  | (9,365) |
Net current-period other comprehensive loss | (383) |  | (6,006) |  | (6,389) |  | (1,149) |  | (2,681) |  | (3,830) |
End of period | $ | 18,301 |  | $ | 7,202 |  | $ | 25,503 |  | $ | 18,301 |  | $ | 7,202 |  | $ | 25,503 |
(1) Changes in other comprehensive income before reclassification for derivatives designated as cash flow hedges are recorded net of ta x benefit (expense) of $1.1 million and $(2.0) million for the three and nine months ended December 31, 2023, respectively. The tax impact of other comprehensive income before reclassification for post-retirement plans for the three and nine months ended December 31, 2023 was immaterial.
| Three Months Ended December 31, 2022 | Nine Months Ended December 31, 2022
| Post-retirement plans | Derivatives designated as cash flow hedges | Totals | Post-retirement plans | Derivatives designated as cash flow hedges | Totals
Beginning of period | $ | 8,807 |  | $ | 13,334 |  | $ | 22,141 |  | $ | 8,811 |  | $ | (226) |  | $ | 8,585 |
Other comprehensive income before reclassifications(2) | 2 |  | 1,155 |  | 1,157 |  | — |  | 12,337 |  | 12,337 |
Amounts reclassified from accumulated other comprehensive income (loss) | (2) |  | (1,217) |  | (1,219) |  | (4) |  | 1,161 |  | 1,157 |
Net current-period other comprehensive (loss) income | — |  | (62) |  | (62) |  | (4) |  | 13,498 |  | 13,494 |
End of period | $ | 8,807 |  | $ | 13,272 |  | $ | 22,079 |  | $ | 8,807 |  | $ | 13,272 |  | $ | 22,079 |
(2) Changes in other comprehensive income before reclassification for derivatives designated as cash flow hedges are recorded net of tax expense of $0.4 million and $4.4 million for the three and nine months ended December 31, 2022. The tax impact of other comprehensive income before reclassification for post-retirement plans for the three and nine months ended December 31, 2022 was immaterial.

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