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Leases - Schedule of Maturity Analysis of Tenant Leases (Detail)
$ in Thousands
Sep. 30, 2019
USD ($)
Lessor Disclosure [Abstract]  
Tenant leases, 2019 $ 588
Tenant leases, 2020 2,034
Tenant leases, 2021 1,740
Tenant leases, 2022 1,431
Tenant leases, 2023 1,298
Tenant leases, Thereafter 3,650
Tenant leases, Total undiscounted lease payments $ 10,741