Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Revenues:
Revenue, excluding third-party management and other fees	$ 190,842	$ 189,167	$ 370,477	$ 370,081
Intercompany rental revenue	0	0	0	0
Total revenues, excluding third-party management and other fees	190,842	189,167	370,477	370,081
Segment operating expenses:
Property operating expenses	44,880	41,516	89,940	86,576
Observatory expenses	9,822	8,958	17,940	17,389
Other segment expenses	34,939	34,215	70,320	68,787
Total segment operating expenses	89,641	84,689	178,200	172,752
Net operating income	101,201	104,478	192,277	197,329
Segment assets	4,078,750	4,433,250	4,078,750	4,433,250	$ 4,510,287
Intersegment Elimination
Revenues:
Revenue, excluding third-party management and other fees	0	0	0	0
Intercompany rental revenue	(20,666)	(20,980)	(35,826)	(37,047)
Total revenues, excluding third-party management and other fees	(20,666)	(20,980)	(35,826)	(37,047)
Segment operating expenses:
Property operating expenses	0	0	0	0
Observatory expenses	0	0	0	0
Other segment expenses	(20,666)	(20,980)	(35,826)	(37,047)
Total segment operating expenses	(20,666)	(20,980)	(35,826)	(37,047)
Net operating income	0	0	0	0
Segment assets	0	0	0	0
Real Estate \| Operating Segments
Revenues:
Revenue, excluding third-party management and other fees	156,943	155,043	313,417	311,361
Intercompany rental revenue	20,666	20,980	35,826	37,047
Total revenues, excluding third-party management and other fees	177,609	176,023	349,243	348,408
Segment operating expenses:
Property operating expenses	44,880	41,516	89,940	86,576
Observatory expenses	0	0	0	0
Other segment expenses	34,939	34,215	70,320	68,787
Total segment operating expenses	79,819	75,731	160,260	155,363
Net operating income	97,790	100,292	188,983	193,045
Segment assets	3,813,645	4,171,251	3,813,645	4,171,251
Observatory \| Operating Segments
Revenues:
Revenue, excluding third-party management and other fees	33,899	34,124	57,060	58,720
Intercompany rental revenue	0	0	0	0
Total revenues, excluding third-party management and other fees	33,899	34,124	57,060	58,720
Segment operating expenses:
Property operating expenses	0	0	0	0
Observatory expenses	9,822	8,958	17,940	17,389
Other segment expenses	20,666	20,980	35,826	37,047
Total segment operating expenses	30,488	29,938	53,766	54,436
Net operating income	3,411	4,186	3,294	4,284
Segment assets	$ 265,105	$ 261,999	$ 265,105	$ 261,999