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Rental Income (Schedule of Minimum Rental Income) (Details)
$ in Thousands
Apr. 30, 2020
USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]  
2020 $ 19,936 [1]
2021 18,984
2022 15,727
2023 13,099
2024 10,948
Thereafter 46,774
Total $ 125,468
[1] Amount represents full fiscal year