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Leases - Schedule of Cash to be Received Future Minimum Rentals for Noncancelable Lease Term (Detail)
$ in Thousands
Sep. 30, 2017
USD ($)
Leases [Abstract]  
2018 $ 6,457
2019 11,345
2020 14,369
2021 20,287
Thereafter 114,877
Total $ 167,335