Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2012

Shareholders' Equity

Reconciliation of changes in shareholders equity

	Shareholders’			Shareholders’
	Equity			Equity
	Attributable to			Attributable to		Total
	CommonWealth			Noncontrolling		Shareholders’
	REIT			Interest		Equity
Balance at December 31, 2011	$	3,568,517		$	—	$	3,568,517
Net income	39,745			5,415		45,160
Other comprehensive income:
Unrealized loss on derivative instrument	(2,441		)	—		(2,441		)
Foreign currency translation adjustments	1,081			—		1,081
Decrease in share of investees other comprehensive loss	(4		)	—		(4		)
Total comprehensive income	38,381			5,415		43,796
Issuance of shares of subsidiary, net	(23,856		)	204,670		180,814
Share grants	187			—		187
Distributions	(111,188		)	—		(111,188		)
Balance at June 30, 2012	$	3,472,041		$	210,085	$	3,682,126