Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Revenues:
Revenue, excluding third-party management and other fees	$ 196,631	$ 190,842	$ 386,679	$ 370,477
Intercompany rental revenue	0	0	0	0
Total revenues, excluding third-party management and other fees	196,631	190,842	386,679	370,477
Segment operating expenses:
Property operating expenses	47,774	44,880	95,518	89,940
Observatory expenses	11,795	9,822	19,663	17,940
Other segment expenses	34,418	34,939	71,362	70,320
Total segment operating expenses	93,987	89,641	186,543	178,200
Net operating income (loss)	102,644	101,201	200,136	192,277
Segment assets	4,273,098	4,078,750	4,273,098	4,078,750	$ 4,468,961
Intersegment Elimination
Revenues:
Revenue, excluding third-party management and other fees	0	0	0	0
Intercompany rental revenue	(14,771)	(20,666)	(27,592)	(35,826)
Total revenues, excluding third-party management and other fees	(14,771)	(20,666)	(27,592)	(35,826)
Segment operating expenses:
Property operating expenses	0	0	0	0
Observatory expenses	0	0	0	0
Other segment expenses	(14,771)	(20,666)	(27,592)	(35,826)
Total segment operating expenses	(14,771)	(20,666)	(27,592)	(35,826)
Net operating income (loss)	0	0	0	0
Segment assets	0	0	0	0
Real Estate \| Operating Segments
Revenues:
Revenue, excluding third-party management and other fees	172,406	156,943	343,944	313,417
Intercompany rental revenue	14,771	20,666	27,592	35,826
Total revenues, excluding third-party management and other fees	187,177	177,609	371,536	349,243
Segment operating expenses:
Property operating expenses	47,774	44,880	95,518	89,940
Observatory expenses	0	0	0	0
Other segment expenses	34,418	34,939	71,362	70,320
Total segment operating expenses	82,192	79,819	166,880	160,260
Net operating income (loss)	104,985	97,790	204,656	188,983
Segment assets	4,177,101	3,813,645	4,177,101	3,813,645
Observatory \| Operating Segments
Revenues:
Revenue, excluding third-party management and other fees	24,225	33,899	42,735	57,060
Intercompany rental revenue	0	0	0	0
Total revenues, excluding third-party management and other fees	24,225	33,899	42,735	57,060
Segment operating expenses:
Property operating expenses	0	0	0	0
Observatory expenses	11,795	9,822	19,663	17,940
Other segment expenses	14,771	20,666	27,592	35,826
Total segment operating expenses	26,566	30,488	47,255	53,766
Net operating income (loss)	(2,341)	3,411	(4,520)	3,294
Segment assets	$ 95,997	$ 265,105	$ 95,997	$ 265,105