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Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Amortization of below market leases and in-place leases) Table (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Amortization of Below Market Lease   $ 0.1 $ 0.2
Amortization of Intangible Assets $ 9.1 $ 10.4 $ 9.4