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	$ 13,141	$ 15,742	$ 41,424	$ 48,133
Other revenue	740	743	2,183	3,437
Total revenues	13,881	16,485	43,607	51,570
Expenses:
Operating expenses	6,102	6,444	19,311	21,882
Depreciation and amortization	4,588	5,137	13,371	14,649
General and administrative	7,572	7,191	30,691	26,097
Total expenses	18,262	18,772	63,373	62,628
Interest and other income, net	1,599	2,606	5,068	18,944
Interest expense (including net amortization of debt premiums and deferred financing fees of $—, $(3), $— and $(119), respectively)	0	(9)	0	(620)
Gain on early extinguishment of debt	0	131	0	131
Gain on sale of properties, net	0	0	0	446,536
(Loss) income before income taxes	(2,782)	441	(14,698)	453,933
Income tax expense	(32)	(71)	(94)	(170)
Net (loss) income	(2,814)	370	(14,792)	453,763
Net loss (income) attributable to noncontrolling interest	6	(1)	30	(803)
Net (loss) income attributable to Equity Commonwealth	(2,808)	369	(14,762)	452,960
Preferred distributions	(1,997)	(1,997)	(5,991)	(5,991)
Net (loss) income attributable to Equity Commonwealth common shareholders	$ (4,805)	$ (1,628)	$ (20,753)	$ 446,969
Weighted average common shares outstanding — basic (in shares)	122,190	121,673	122,128	121,824
Weighted average common shares outstanding — diluted (in shares)	122,190	121,673	122,128	126,282
Earnings per common share attributable to Equity Commonwealth common shareholders:
Basic (in dollars per share)	$ (0.04)	$ (0.01)	$ (0.17)	$ 3.67
Diluted (in dollars per share)	(0.04)	(0.01)	(0.17)	3.59
Distributions declared per common share (in dollars per share)	$ 0	$ 3.50	$ 0	$ 3.50