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Leases - Assets and Liabilities of Lessee (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2023 | Apr. 30, 2022
Leases [Abstract] |  |
Weighted-average remaining lease-term - finance lease | 15 years 1 month 6 days | 19 years 3 months 18 days
Weighted-average remaining lease-term - operating lease | 19 years 9 months 18 days | 20 years 3 months 18 days
Weighted-average discount rate - finance lease | 4.40% | 3.97%
Weighted-average discount rate - operating lease | 4.33% | 3.98%
Right-of-use assets obtained in exchange for new finance lease liabilities (in thousands) | $ 25,166 | $ 52,525
Right-of-use assets obtained in exchange for new operating lease liabilities (in thousands) | $ 14,642 | $ 87,723

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