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Leases - Schedule of Future Minimum Lease Payments under Topic 840 (Details)
$ in Thousands
Jan. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 14,036
2021 11,325
2022 10,135
2023 8,279
2024 7,683
Thereafter 35,020
Total operating leases $ 86,478