Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Rental revenue	$ 139,558	$ 139,909	$ 420,586	$ 426,021
Observatory revenue	12,796	4,419	23,758	24,049
Lease termination fees	11,321	331	15,949	1,575
Third-party management and other fees	314	283	917	930
Other revenue and fees	1,059	1,633	2,550	5,254
Total revenues	165,048	146,575	463,760	457,829
Operating expenses:
Property operating expenses	33,357	33,836	92,429	105,054
Ground rent expenses	2,331	2,331	6,994	6,994
General and administrative expenses	14,427	14,517	42,369	48,617
Observatory expenses	6,370	5,931	16,226	18,087
Real estate taxes	29,566	31,196	92,367	90,029
Impairment charges	0	2,103	0	6,204
Depreciation and amortization	65,794	44,733	155,339	143,609
Total operating expenses	151,845	134,647	405,724	418,594
Total operating income	13,203	11,928	58,036	39,235
Other income (expense):
Interest income	211	366	497	2,529
Interest expense	(23,577)	(23,360)	(70,553)	(66,906)
Loss on early extinguishment of debt	0	0	(214)	(86)
IPO litigation expense	0	(1,165)	0	(1,165)
Loss before income taxes	(10,163)	(12,231)	(12,234)	(26,393)
Income tax (expense) benefit	(20)	(38)	3,271	2,794
Net income (loss)	(10,183)	(12,269)	(8,963)	(23,599)
Private perpetual preferred unit distributions	(1,050)	(1,050)	(3,151)	(3,147)
Net loss attributable to non-controlling interests	4,256	5,115	4,591	10,244
Net loss attributable to common stockholders	$ (6,977)	$ (8,204)	$ (7,523)	$ (16,502)
Total weighted average shares:
Basic (in shares)	172,494	173,048	172,487	176,299
Diluted (in shares)	277,716	280,940	277,829	285,640
Earnings per share attributable to common stockholders:
Basic (in USD per share)	$ (0.04)	$ (0.05)	$ (0.04)	$ (0.09)
Diluted (in USD per share)	(0.04)	(0.05)	(0.04)	(0.09)
Dividends per share (in USD per share)	$ 0.035	$ 0	$ 0.070	$ 0.210