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Deferred Charges and Other Assets, net - Allocated values of above-market leases and below-market leases (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Above-Market Leases |  |
Allocated value net | $ 48,145 |
Above Market |  |
Above-Market Leases |  |
Original allocated value | 80,120 | $ 59,916
Less accumulated amortization | (33,271) | (35,737)
Allocated value net | 46,849 | 24,179
Below Market |  |
Below-Market Leases |  |
Original allocated value | 114,790 | 90,790
Less accumulated amortization | (43,656) | (53,727)
Allocated value, net | $ 71,134 | $ 37,063

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