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Deferred Charges and Other Assets, net - Allocated values of above-market leases and below-market leases (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Above-Market Leases |  |
Above-Market Leases |  |
Original allocated value | $ 62,679 | $ 140,889
Less accumulated amortization | (36,199) | (49,847)
Allocated value net | 26,480 | 91,042
Below-Market Leases |  |
Below-Market Leases |  |
Original allocated value | 92,420 | 108,330
Less accumulated amortization | (54,837) | (56,345)
Allocated value net | $ 37,583 | $ 51,985

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