Noncontrolling Interest (Tables)

12 Months Ended

Dec. 31, 2020

Noncontrolling Interest [Abstract]

Schedule of Issued and Outstanding Common Shares

The following table presents the changes in Equity Commonwealth’s issued and outstanding common shares and units for the year ended December 31, 2020:

	Common Shares	OP Units and LTIP Units	Total
Outstanding at January 1, 2020	121,924,199	48,660	121,972,859
Repurchase of shares	(895,068)	—	(895,068)
OP Unit redemption	—	(1,000)	(1,000)
Share-based compensation grants and vesting, net of forfeitures	493,424	195,856	689,280
Outstanding at December 31, 2020	121,522,555	243,516	121,766,071
Noncontrolling ownership interest in the Operating Trust			0.20	%

Schedule of Issued and Outstanding Units

The following table presents the changes in Equity Commonwealth’s issued and outstanding common shares and units for the year ended December 31, 2020:

	Common Shares	OP Units and LTIP Units	Total
Outstanding at January 1, 2020	121,924,199	48,660	121,972,859
Repurchase of shares	(895,068)	—	(895,068)
OP Unit redemption	—	(1,000)	(1,000)
Share-based compensation grants and vesting, net of forfeitures	493,424	195,856	689,280
Outstanding at December 31, 2020	121,522,555	243,516	121,766,071
Noncontrolling ownership interest in the Operating Trust			0.20	%

The table below presents a summary of restricted share, RSU and LTIP Unit activity for the years ended December 31, 2020, 2019 and 2018:

	Number of Restricted Shares and Time-Based LTIP Units	Weighted Average Grant Date Fair Value		Number of RSUs and Market-Based LTIP Units	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2017	678,952	$	27.41	2,131,947	$	15.69
Granted	154,209	30.05		634,628	14.90
Vested	(407,273)	27.06		(367,260)	15.79
Not earned(1)	—	—		(352,671)	15.47
Outstanding at December 31, 2018	425,888	$	28.70	2,046,644	$	15.47
Granted	138,819	32.20		568,609	15.91
Vested	(164,074)	28.60		(384,811)	15.53
Not earned(1)	—	—		(225,654)	15.57
Forfeited	(319)	31.08		(1,613)	15.56
Outstanding at December 31, 2019	400,314	$	29.95	2,003,175	$	15.57
Granted	136,356	32.47		532,243	16.12
Vested	(149,103)	29.65		(473,369)	15.79
Not earned(1)	—	—		(97,131)	15.97
Forfeited(2)	(1,879)	31.41		—	—
Outstanding at December 31, 2020	385,688	$	31.52	1,964,918	$	15.65

(1) The table presents the maximum number of shares issued or issuable from outstanding equity awards. RSUs and market-based LTIP Units not earned are the shares market-based award recipients do not receive based on the performance measurement completed at the end of the performance period.

(2) Restricted shares forfeited as a result of a resignation of an independent Trustee in November 2020.