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Leases - Summary of Future Minimum Lease Commitments Under Non-cancelable Leases (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Leases [Abstract]  
2020 $ 6,323
2021 5,421
2022 4,493
2023 3,237
2024 2,922
Thereafter 4,039
Total $ 26,435