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Lease Intangible Assets and Liabilities - Schedule of Future Amortization for Below-Market Ground Leases (Detail) - Leases Acquired In-Place Market Adjustment [Member]
$ in Thousands
Jun. 30, 2018
USD ($)
Finite-Lived Intangible Assets [Line Items]  
Remainder of 2018 $ 101
2019 203
2020 203
2021 203
2022 $ 203