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Investment in Limited Partnership - Estimated Premiums to be Paid on Life Settlement Contracts (Details) - WE Investment
$ in Thousands
May 31, 2020
USD ($)
Investments in and Advances to Affiliates [Line Items]  
2020 $ 51,399
2021 103,815
2022 99,449
2023 93,168
2024 87,883
Thereafter 570,730
Total $ 1,006,444