Condensed Consolidated Statements of Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Rental revenue	$ 143,417
Rental revenue		$ 122,311
Tenant expense reimbursement	0	17,794
Observatory revenue	20,569	21,249
Lease termination fees	388	622
Third-party management and other fees	320	463
Other revenue and fees	2,599	4,832
Total revenues	167,293	167,271
Operating expenses:
Property operating expenses	42,955	44,185
Ground rent expenses	2,331	2,331
General and administrative expenses	14,026	12,628
Observatory expenses	7,575	7,336
Real estate taxes	28,232	26,744
Depreciation and amortization	46,098	39,883
Total operating expenses	141,217	133,107
Total operating income (loss)	26,076	34,164
Other income (expense):
Interest income	3,739	1,225
Interest expense	(20,689)	(17,591)
Income (loss) before income taxes	9,126	17,798
Income tax benefit	730	260
Net income (loss)	9,856	18,058
Private perpetual preferred unit distributions	(234)	(234)
Net income attributable to non-controlling interests	(3,945)	(8,056)
Net income attributable to common stockholders	$ 5,677	$ 9,768
Total weighted average shares:
Basic (in shares)	175,850	162,667
Diluted (in shares)	298,049	296,827
Earnings per share attributable to common stockholders:
Basic (in USD per share)	$ 0.03	$ 0.06
Diluted (in USD per share)	0.03	0.06
Dividends per share (in USD per share)	$ 0.105	$ 0.105