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Loans Payable and Long-Term Debt (Schedule Of Debt Maturities) (Details) - USD ($) $ in Thousands | Apr. 30, 2019 | Apr. 30, 2018
--- | --- | ---
Debt Instrument [Line Items] |  |
2020 | $ 2,285 |
2021 | 1,860 |
2022 | 28,465 |
2023 | 313,191 |
2024 | 754 |
2025 and thereafter | 356,750 |
Total | 703,305 |
Debt issuance costs | (11,814) |
Current maturities | (2,286) | $ (4,143)
Total long-term debt | 689,205 | $ 809,897
Term Loans [Member] |  |
Debt Instrument [Line Items] |  |
2020 | 0 |
2021 | 0 |
2022 | 27,500 |
2023 | 312,500 |
2024 | 0 |
2025 and thereafter | 0 |
Total | 340,000 |
Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
2020 | 0 |
2021 | 0 |
2022 | 0 |
2023 | 0 |
2024 | 0 |
2025 and thereafter | 350,000 |
Total | 350,000 |
Economic Development Loans [Member] |  |
Debt Instrument [Line Items] |  |
2020 | 2,285 |
2021 | 1,860 |
2022 | 965 |
2023 | 679 |
2024 | 690 |
2025 and thereafter | 166 |
Total | 6,645 |
Other Long-term Debt [Member] |  |
Debt Instrument [Line Items] |  |
2020 | 0 |
2021 | 0 |
2022 | 0 |
2023 | 12 |
2024 | 64 |
2025 and thereafter | 6,584 |
Total | $ 6,660 |

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