Segment Reporting - Components of Segment Net Income (Loss) for Each Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenues:
Rental revenue	$ 140,091	$ 147,514
Intercompany rental revenue	0	0
Observatory revenue	22,154	13,241
Lease termination fees	0	1,173
Third-party management and other fees	427	310
Other revenue and fees	1,950	1,796
Total revenues	164,622	164,034
Operating expenses:
Property operating expenses	42,044	38,644
Intercompany rent expense	0	0
Ground rent expenses	2,331	2,331
General and administrative expenses	15,708	13,686
Observatory expenses	7,855	6,215
Real estate taxes	31,788	30,004
Depreciation and amortization	47,408	67,106
Total operating expenses	147,134	157,986
Total operating income (loss)	17,488	6,048
Other income (expense):
Interest income	2,595	149
Interest expense	(25,304)	(25,014)
Gain on sale of property	15,696	0
Income (loss) before income taxes	10,475	(18,817)
Income tax (expense) benefit	1,219	1,596
Net income (loss)	11,694	(17,221)
Segment assets	4,157,363	4,243,330	$ 4,163,594
Expenditures for segment assets	34,594	39,175
Intersegment Elimination
Revenues:
Rental revenue	0	0
Intercompany rental revenue	(15,914)	(10,620)
Observatory revenue	0	0
Lease termination fees		0
Third-party management and other fees	0	0
Other revenue and fees	0	0
Total revenues	(15,914)	(10,620)
Operating expenses:
Property operating expenses	0	0
Intercompany rent expense	(15,914)	(10,620)
Ground rent expenses	0	0
General and administrative expenses	0	0
Observatory expenses	0	0
Real estate taxes	0	0
Depreciation and amortization	0	0
Total operating expenses	(15,914)	(10,620)
Total operating income (loss)	0	0
Other income (expense):
Interest income	0	0
Interest expense	0	0
Gain on sale of property	0
Income (loss) before income taxes	0	0
Income tax (expense) benefit	0	0
Net income (loss)	0	0
Segment assets	0	0
Expenditures for segment assets	0	0
Real Estate | Operating Segments
Revenues:
Rental revenue	140,091	147,514
Intercompany rental revenue	15,914	10,620
Observatory revenue	0	0
Lease termination fees		1,173
Third-party management and other fees	427	310
Other revenue and fees	1,950	1,796
Total revenues	158,382	161,413
Operating expenses:
Property operating expenses	42,044	38,644
Intercompany rent expense	0	0
Ground rent expenses	2,331	2,331
General and administrative expenses	15,708	13,686
Observatory expenses	0	0
Real estate taxes	31,788	30,004
Depreciation and amortization	47,364	67,071
Total operating expenses	139,235	151,736
Total operating income (loss)	19,147	9,677
Other income (expense):
Interest income	2,558	149
Interest expense	(25,304)	(25,014)
Gain on sale of property	15,696
Income (loss) before income taxes	12,097	(15,188)
Income tax (expense) benefit	(198)	(144)
Net income (loss)	11,899	(15,332)
Segment assets	3,903,661	3,998,791
Expenditures for segment assets	34,536	38,884
Observatory | Operating Segments
Revenues:
Rental revenue	0	0
Intercompany rental revenue	0	0
Observatory revenue	22,154	13,241
Lease termination fees		0
Third-party management and other fees	0	0
Other revenue and fees	0	0
Total revenues	22,154	13,241
Operating expenses:
Property operating expenses	0	0
Intercompany rent expense	15,914	10,620
Ground rent expenses	0	0
General and administrative expenses	0	0
Observatory expenses	7,855	6,215
Real estate taxes	0	0
Depreciation and amortization	44	35
Total operating expenses	23,813	16,870
Total operating income (loss)	(1,659)	(3,629)
Other income (expense):
Interest income	37	0
Interest expense	0	0
Gain on sale of property	0
Income (loss) before income taxes	(1,622)	(3,629)
Income tax (expense) benefit	1,417	1,740
Net income (loss)	(205)	(1,889)
Segment assets	253,702	244,539
Expenditures for segment assets	$ 58	$ 291