Consolidated Statements of Equity (Unaudited) (USD $) In Thousands	Total	Common shares of beneficial interest	Additional Paid-In Capital	Accumulated Distribution in Excess of Net Income	Accumulated Other Comprehensive Income	Non- Controlling Interests
Beginning balance at Dec. 31, 2009	$ 229,200	$ 20,375	$ 498,118	$ (301,317)	$ (87)	$ 12,111
Beginning balance, shares at Dec. 31, 2009		20,375
Net income attributable to Winthrop Realty Trust	8,781			8,781
Net income attributable to non-controlling interests	420					420
Distributions to non-controlling interests	(200)					(200)
Contributions from non-controlling interests	519					519
Dividends paid or accrued on Common Shares of Beneficial Interest ($0.325 per share)	(6,877)			(6,877)
Dividends paid or accrued on Series C Preferred Shares ($0.8125 per share)	(171)			(171)
Change in unrealized gain on available for sale securities	2				2
Change in unrealized gain on interest rate derivatives	12				12
Conversion of Series C Preferred Shares to Common Shares, shares		714
Conversion of Series C Preferred Shares to Common Shares	8,948	714	8,234
Shares issued pursuant to dividend reinvestment plan, shares		92
Shares issued pursuant to dividend reinvestment plan	1,180	92	1,088
Ending balance at Jun. 30, 2010	241,814	21,181	507,440	(299,584)	(73)	12,850
Ending balance, shares at Jun. 30, 2010		21,181
Beginning balance at Dec. 31, 2010	309,847	27,030	569,586	(300,782)	(63)	14,076
Beginning balance, shares at Dec. 31, 2010		27,030
Net income attributable to Winthrop Realty Trust	10,926			10,926
Net income attributable to non-controlling interests	533					533
Distributions to non-controlling interests	(194)					(194)
Contributions from non-controlling interests	277					277
Dividends paid or accrued on Common Shares of Beneficial Interest ($0.325 per share)	(9,748)			(9,748)
Dividends paid or accrued on Series C Preferred Shares ($0.8125 per share)	(117)			(117)
Change in unrealized gain on interest rate derivatives	63				63
Net proceeds from Common Shares offering, shares		5,750
Net proceeds from Common Shares offering	61,386	5,750	55,636
Shares issued pursuant to dividend reinvestment plan, shares		118
Shares issued pursuant to dividend reinvestment plan	1,368	118	1,250
Ending balance at Jun. 30, 2011	$ 374,341	$ 32,898	$ 626,472	$ (299,721)	$ 0	$ 14,692
Ending balance, shares at Jun. 30, 2011		32,898