Segment Reporting - Segment Revenue and Profit or Loss Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Rental revenue		$ 597,319	$ 591,048	$ 559,690
Intercompany rental revenue		0	0	0
Observatory revenue		129,366	105,978	41,474
Lease termination fees		0	20,032	16,230
Third-party management and other fees		1,351	1,361	1,219
Other revenue and fees		11,536	8,622	5,481
Total revenues		739,572	727,041	624,094
Operating expenses:
Property operating expenses		167,324	157,935	126,986
Intercompany rent expense		0	0	0
Ground rent expenses		9,326	9,326	9,326
General and administrative expenses		63,939	61,765	55,947
Observatory expenses		35,265	31,036	23,206
Real estate taxes		127,101	123,057	119,967
Impairment charges		0	0	7,723
Depreciation and amortization		189,911	216,894	201,806
Total operating expenses		592,866	600,013	544,961
Total operating income (loss)		146,706	127,028	79,133
Other income (expense):
Interest income		15,136	4,948	704
Interest expense		(101,484)	(101,206)	(94,394)
Gain on sale/disposition of properties		26,764	33,988	0
Loss on early extinguishment of debt		0	0	(214)
Income (loss) before income taxes		87,122	64,758	(14,771)
Income tax (expense) benefit		(2,715)	(1,546)	1,734
Net income (loss)		84,407	63,212	(13,037)
Segment assets	$ 4,282,447	4,219,333	4,163,594	4,282,447
Expenditures for segment assets		169,155	85,961	398,372
Intersegment Elimination
Revenues:
Rental revenue		0	0	0
Intercompany rental revenue		(80,514)	(65,005)	(23,413)
Observatory revenue		0	0	0
Lease termination fees		0	0	0
Third-party management and other fees		0	0	0
Other revenue and fees		0	0	0
Total revenues		(80,514)	(65,005)	(23,413)
Operating expenses:
Property operating expenses		0	0	0
Intercompany rent expense		(80,514)	(65,005)	(23,413)
Ground rent expenses		0	0	0
General and administrative expenses		0	0	0
Observatory expenses		0	0	0
Real estate taxes		0	0	0
Impairment charges			0	0
Depreciation and amortization		0	0	0
Total operating expenses		(80,514)	(65,005)	(23,413)
Total operating income (loss)		0	0	0
Other income (expense):
Interest income		0	0	0
Interest expense		0	0	0
Gain on sale/disposition of properties		0	0
Loss on early extinguishment of debt				0
Income (loss) before income taxes		0	0	0
Income tax (expense) benefit		0	0	0
Net income (loss)		0	0	0
Segment assets	0	0	0	0
Expenditures for segment assets		0		0
Real Estate
Operating expenses:
Impairment charges	7,700
Real Estate | Operating segments
Revenues:
Rental revenue		597,319	591,048	559,690
Intercompany rental revenue		80,514	65,005	23,413
Observatory revenue		0	0	0
Lease termination fees		0	20,032	16,230
Third-party management and other fees		1,351	1,361	1,219
Other revenue and fees		11,536	8,622	5,343
Total revenues		690,720	686,068	605,895
Operating expenses:
Property operating expenses		167,324	157,935	126,986
Intercompany rent expense		0	0	0
Ground rent expenses		9,326	9,326	9,326
General and administrative expenses		63,939	61,765	55,947
Observatory expenses		0	0	0
Real estate taxes		127,101	123,057	119,967
Impairment charges			0	7,723
Depreciation and amortization		189,762	216,707	201,676
Total operating expenses		557,452	568,790	521,625
Total operating income (loss)		133,268	117,278	84,270
Other income (expense):
Interest income		14,936	4,901	701
Interest expense		(101,484)	(101,206)	(94,292)
Gain on sale/disposition of properties		26,764	33,988
Loss on early extinguishment of debt				(214)
Income (loss) before income taxes		73,484	54,961	(9,535)
Income tax (expense) benefit		(552)	(584)	(613)
Net income (loss)		72,932	54,377	(10,148)
Segment assets	4,037,122	3,957,659	3,909,299	4,037,122
Expenditures for segment assets		169,044	85,646	398,368
Observatory | Operating segments
Revenues:
Rental revenue		0	0	0
Intercompany rental revenue		0	0	0
Observatory revenue		129,366	105,978	41,474
Lease termination fees		0	0	0
Third-party management and other fees		0	0	0
Other revenue and fees		0	0	138
Total revenues		129,366	105,978	41,612
Operating expenses:
Property operating expenses		0	0	0
Intercompany rent expense		80,514	65,005	23,413
Ground rent expenses		0	0	0
General and administrative expenses		0	0	0
Observatory expenses		35,265	31,036	23,206
Real estate taxes		0	0	0
Impairment charges			0	0
Depreciation and amortization		149	187	130
Total operating expenses		115,928	96,228	46,749
Total operating income (loss)		13,438	9,750	(5,137)
Other income (expense):
Interest income		200	47	3
Interest expense		0	0	(102)
Gain on sale/disposition of properties		0	0
Loss on early extinguishment of debt				0
Income (loss) before income taxes		13,638	9,797	(5,236)
Income tax (expense) benefit		(2,163)	(962)	2,347
Net income (loss)		11,475	8,835	(2,889)
Segment assets	$ 245,325	261,674	254,295	245,325
Expenditures for segment assets		$ 111	$ 315	$ 4