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Tenant Leases (Details) - Minimum Future Rentals to be Received under Non-cancellable Leases
$ in Thousands
Dec. 31, 2016
USD ($)
Leases [Abstract]  
2017 $ 166,181
2018 146,496
2019 125,052
2020 105,841
2021 85,752
Thereafter 376,228
Total minimum lease payments $ 1,005,550