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Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Revenues:      
Revenue, excluding third-party management and other fees $ 179,635 $ 180,914  
Intercompany rental revenue 0 0  
Total revenues 179,635 180,914  
Segment operating expenses:      
Property operating expenses 45,060 45,060  
Observatory expenses 8,118 8,431  
Other segment expenses 35,381 34,572  
Total segment operating expenses 88,559 88,063  
Net operating income 91,076 92,851  
Segment assets 4,114,380 4,190,587 $ 4,510,287
Intersegment Elimination      
Revenues:      
Revenue, excluding third-party management and other fees 0 0  
Intercompany rental revenue (15,160) (16,067)  
Total revenues (15,160) (16,067)  
Segment operating expenses:      
Property operating expenses 0 0  
Observatory expenses 0 0  
Other segment expenses (15,160) (16,067)  
Total segment operating expenses (15,160) (16,067)  
Net operating income 0 0  
Segment assets 0 0  
Real Estate | Operating Segments      
Revenues:      
Revenue, excluding third-party management and other fees 156,474 156,318  
Intercompany rental revenue 15,160 16,067  
Total revenues 171,634 172,385  
Segment operating expenses:      
Property operating expenses 45,060 45,060  
Observatory expenses 0 0  
Other segment expenses 35,381 34,572  
Total segment operating expenses 80,441 79,632  
Net operating income 91,193 92,753  
Segment assets 3,851,216 3,931,685  
Observatory | Operating Segments      
Revenues:      
Revenue, excluding third-party management and other fees 23,161 24,596  
Intercompany rental revenue 0 0  
Total revenues 23,161 24,596  
Segment operating expenses:      
Property operating expenses 0 0  
Observatory expenses 8,118 8,431  
Other segment expenses 15,160 16,067  
Total segment operating expenses 23,278 24,498  
Net operating income (117) 98  
Segment assets $ 263,164 $ 258,902