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LEASES - Minimum Lease Payments Under Operating Leases (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
2020 $ 6,984
2021 4,941
2022 4,291
2023 4,122
2024 3,710
Thereafter 12,010
Total future minimum lease payments $ 36,058