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Commitments and Contingencies - Annual Minimum Lease Commitments (Details)
$ in Thousands
Aug. 31, 2019
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
2020 $ 13,560
2021 10,728
2022 7,465
2023 5,907
2024 3,528
Thereafter 2,625
Total lease commitments $ 43,813