Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Rental revenue	$ 148,113	$ 143,417
Observatory revenue	19,544	20,569
Lease termination fees	211	388
Third-party management and other fees	346	320
Other revenue and fees	2,010	2,599
Total revenues	170,224	167,293
Operating expenses:
Property operating expenses	41,468	42,955
Ground rent expenses	2,331	2,331
General and administrative expenses	15,951	14,026
Observatory expenses	8,154	7,575
Real estate taxes	29,254	28,232
Depreciation and amortization	46,093	46,098
Total operating expenses	143,251	141,217
Total operating income	26,973	26,076
Other income (expense):
Interest income	637	3,739
Interest expense	(19,618)	(20,689)
Loss on early extinguishment of debt	(86)	0
Income before income taxes	7,906	9,126
Income tax benefit	382	730
Net income	8,288	9,856
Private perpetual preferred unit distributions	(1,050)	(234)
Net income attributable to non-controlling interests	(2,743)	(3,945)
Net income attributable to common stockholders	$ 4,495	$ 5,677
Total weighted average shares:
Basic (in shares)	181,741	175,850
Diluted (in shares)	292,645	298,049
Earnings per share attributable to common stockholders:
Basic (in USD per share)	$ 0.02	$ 0.03
Diluted (in USD per share)	0.02	0.03
Dividends per share (in USD per share)	$ 0.105	$ 0.105