CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Rental income	$ 61,091	$ 92,722	$ 215,648	$ 324,345
Tenant reimbursements and other income	16,707	21,910	53,300	72,789
Total revenues	77,798	114,632	268,948	397,134
Expenses:
Operating expenses	32,380	49,313	110,751	157,964
Depreciation and amortization	21,133	29,184	71,970	102,766
General and administrative	11,689	13,277	35,727	38,766
Loss on asset impairment	0	0	19,714	43,736
Total expenses	65,202	91,774	238,162	343,232
Operating income	12,596	22,858	30,786	53,902
Interest and other income	7,596	3,013	17,987	7,184
Interest expense (including net amortization of debt discounts, premiums and deferred financing fees of $784, $948, $2,346 and $2,880, respectively)	(11,510)	(21,427)	(41,387)	(65,074)
Loss on early extinguishment of debt	(203)	0	(266)	(118)
Foreign currency exchange loss	0	0	0	(5)
Gain on sale of properties, net	25,080	82,169	44,670	225,210
Income before income taxes	33,559	86,613	51,790	221,099
Income tax expense	(335)	(225)	(555)	(465)
Net income	33,224	86,388	51,235	220,634
Net income attributable to noncontrolling interest	(12)	0	(18)	0
Net income attributable to Equity Commonwealth	33,212	86,388	51,217	220,634
Preferred distributions	(1,997)	(1,997)	(5,991)	(15,959)
Excess fair value of consideration paid over carrying value of preferred shares	0	0	0	(9,609)
Net income attributable to Equity Commonwealth common shareholders	$ 31,215	$ 84,391	$ 45,226	$ 195,066
Weighted average common shares outstanding — basic (in shares)	124,089	125,533	124,068	125,627
Weighted average common shares outstanding — diluted (in shares)	125,175	126,568	125,194	127,009
Earnings per common share attributable to Equity Commonwealth common shareholders:
Basic (in dollars per share)	$ 0.25	$ 0.67	$ 0.36	$ 1.55
Diluted (in dollars per share)	$ 0.25	$ 0.67	$ 0.36	$ 1.54