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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Apr. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Changes in Accumulated Other Comprehensive Loss by Component, Net of Tax | Changes in Accumulated other comprehensive loss by component, net of tax, for the years ended April 30, 2023, 2022, and 2021 were as follows:
| Foreign Currency Translation |  | Unamortized Retirement Costs |  | Interest Rate Swaps |  | Total
Balance at April 30, 2020 | $ | (340,703) |  |  | $ | (227,920) |  |  | $ | (6,874) |  |  | $ | (575,497) |
Other comprehensive income (loss) before reclassifications | 82,762 |  |  | (6,273) |  |  | (639) |  |  | 75,850 |
Amounts reclassified from Accumulated other comprehensive loss | — |  |  | 6,047 |  |  | 2,810 |  |  | 8,857 |
Total other comprehensive income (loss) | 82,762 |  |  | (226) |  |  | 2,171 |  |  | 84,707 |
Balance at April 30, 2021 | $ | (257,941) |  |  | $ | (228,146) |  |  | $ | (4,703) |  |  | $ | (490,790) |
Other comprehensive (loss) income before reclassifications | (71,625) |  |  | 40,247 |  |  | 5,165 |  |  | (26,213) |
Amounts reclassified from Accumulated other comprehensive loss | — |  |  | 5,673 |  |  | 3,184 |  |  | 8,857 |
Total other comprehensive (loss) income | (71,625) |  |  | 45,920 |  |  | 8,349 |  |  | (17,356) |
Balance at April 30, 2022 | $ | (329,566) |  |  | $ | (182,226) |  |  | $ | 3,646 |  |  | $ | (508,146) |
Other comprehensive income (loss) before reclassifications | 3,220 |  |  | (29,053) |  |  | 4,385 |  |  | (21,448) |
Amounts reclassified from Accumulated other comprehensive loss | — |  |  | 4,473 |  |  | (3,781) |  |  | 692 |
Total other comprehensive income (loss) | 3,220 |  |  | (24,580) |  |  | 604 |  |  | (20,756) |
Balance at April 30, 2023 | $ | (326,346) |  |  | $ | (206,806) |  |  | $ | 4,250 |  |  | $ | (528,902) |

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