Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details)

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Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2022
Foxwoods [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges $ 19.2 $ 45.7 $ 7.0 $ 64.8  
Jeffersonville [Member]          
Property, Plant and Equipment [Line Items]          
Impairment charges $ 2.4        
Impaired Outlet Center [Member]          
Property, Plant and Equipment [Line Items]          
Outlet center         $ 113.0