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Commitments and contingencies (Schedule of Minimum Rental Income) (Details)
$ in Thousands
Oct. 31, 2020
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2021 $ 17,253
2022 14,470
2023 11,809
2024 9,640
2025 8,191
Thereafter 25,601
Total $ 86,964