CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Rental income	$ 125,459	$ 174,216	$ 457,128	$ 518,663
Tenant reimbursements and other income	33,749	42,379	118,829	130,386
Total revenues	159,208	216,595	575,957	649,049
Expenses:
Operating expenses	73,571	99,392	261,128	293,824
Depreciation and amortization	40,522	57,213	156,858	168,693
General and administrative	16,249	47,450	43,718	96,395
Loss on asset impairment	0	0	17,162	17,922
Acquisition related costs	0	0	0	5
Total expenses	130,342	204,055	478,866	576,839
Operating income	28,866	12,540	97,091	72,210
Interest and other income	637	406	4,813	1,071
Interest expense (including net amortization of debt discounts, premiums and deferred financing fees of $171, $(91), $23 and $(700), respectively)	(25,111)	(35,245)	(82,926)	(111,079)
(Loss) gain on early extinguishment of debt	(3,887)	6,699	6,111	6,699
Gain on sale of equity investment	0	171,754	0	171,721
Gain on issuance of shares by an equity investee	0	0	0	17,020
Foreign currency exchange loss	(9,809)	0	(8,953)	0
Gain on sale of properties	39,793	0	42,953	0
Income from continuing operations before income taxes and equity in earnings of investees	30,489	156,154	59,089	157,642
Income tax expense	(23)	(703)	(2,377)	(2,166)
Equity in earnings of investees	0	1,072	0	24,460
Income from continuing operations	30,466	156,523	56,712	179,936
Discontinued operations:
Income from discontinued operations	0	95	0	8,220
Gain (loss) on asset impairment from discontinued operations	0	122	0	(2,238)
Loss on early extinguishment of debt from discontinued operations	0	0	0	(3,345)
Net income	30,466	156,740	56,712	182,573
Preferred distributions	(6,981)	(6,981)	(20,943)	(25,114)
Excess fair value of consideration over carrying value of preferred shares	0	0	0	(16,205)
Net income attributable to Equity Commonwealth common shareholders	23,485	149,759	35,769	141,254
Amounts attributable to Equity Commonwealth common shareholders:
Income from continuing operations	23,485	149,542	35,769	138,617
Income from discontinued operations	0	95	0	8,220
Gain (loss) on asset impairment from discontinued operations	0	122	0	(2,238)
Loss on early extinguishment of debt from discontinued operations	0	0	0	(3,345)
Net income attributable to Equity Commonwealth common shareholders	$ 23,485	$ 149,759	$ 35,769	$ 141,254
Weighted average common shares outstanding — basic (in shares)	128,739	128,880	129,386	123,736
Weighted average common shares outstanding — diluted (in shares)	129,878	131,243	130,093	123,736
Basic earnings per common share attributable to Equity Commonwealth common shareholders:
Income from continuing operations (in dollars per share)	$ 0.18	$ 1.16	$ 0.28	$ 1.12
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.02
Net income (in dollars per share)	0.18	1.16	0.28	1.14
Diluted earnings per common share attributable to Equity Commonwealth common shareholders:
Income from continuing operations (in dollars per share)	0.18	1.16	0.27	1.12
Income from discontinued operations (in dollars per share)	0.00	0.00	0.00	0.02
Net income (in dollars per share)	0.18	1.16	0.27	1.14
Distributions declared per common share (in dollars per share)	$ 0	$ 0	$ 0	$ 0.25