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Leases Narrative (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Jul. 01, 2021
USD ($)
May 19, 2021
USD ($)
ft²
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Lessor, Lease, Description [Line Items]              
Write-off for accrued rent and accounts receivables     $ 0 $ 7,500 $ 1,300 $ 63,800  
Operating Lease, Payments         24,023 (1,157)  
Right of use assets - operating leases     170,085 [1]   170,085 [1]   $ 146,406
Sumner Square              
Lessor, Lease, Description [Line Items]              
Lessee, Operating Lease, Description   The amendment extends the ground lease for an additional 15 years. Prior to the amendment, the ground lease was scheduled to expire on August 10, 2066. The ground lease will now expire on August 9, 2081.          
Operating Lease, Payments $ 23,000            
Lessee Operating Lease Liability Payments Due, Next Five Years   $ 4,000          
Lessee, Operating Lease, Discount Rate   3.95%          
Right of use assets - operating leases   $ 27,100          
Operating lease costs     $ 100 $ 300 $ 600 $ 1,000  
Net Rentable Area (in sf) | ft²   210,000          
Operating Lease, Liability   $ 26,700          
[1] See Note 4.