Consolidated Statements of Equity (USD $) In Thousands, except Share data	BIOMED REALTY TRUST, INC. [Member] Series A Preferred Stock [Member]	BIOMED REALTY TRUST, INC. [Member] Common Stock [Member]	BIOMED REALTY TRUST, INC. [Member] Additional Paid-In Capital [Member]	BIOMED REALTY TRUST, INC. [Member] Accumulated Other Comprehensive (Loss)/Income [Member]	BIOMED REALTY TRUST, INC. [Member] Dividends in Excess of Earnings [Member]	BIOMED REALTY TRUST, INC. [Member] Total Stockholders'/Partner's Equity [Member]	BIOMED REALTY TRUST, INC. [Member] Noncontrolling Interests [Member]	BIOMED REALTY TRUST, INC. [Member]	BIOMED REALTY, L.P. [Member] Series A Preferred Stock [Member]	BIOMED REALTY, L.P. [Member] Accumulated Other Comprehensive (Loss)/Income [Member]	BIOMED REALTY, L.P. [Member] Total Stockholders'/Partner's Equity [Member]	BIOMED REALTY, L.P. [Member] Noncontrolling Interests [Member]	BIOMED REALTY, L.P. [Member] Limited Partners' Capital [Member]	BIOMED REALTY, L.P. [Member] General Partner's Capital [Member]	BIOMED REALTY, L.P. [Member]
Balance - value at Dec. 31, 2010	$ 222,413	$ 1,310	$ 2,371,488	$ (70,857)	$ (221,176)	$ 2,303,178	$ 9,718	$ 2,312,896	$ 222,413	$ (69,549)	$ 2,313,096	$ (200)	$ 9,918	$ 2,150,314	$ 2,312,896
Balance - shares at Dec. 31, 2010		131,046,509						131,046,509	9,200,000				3,001,250	131,046,509
Net issuances of unvested restricted common stock/OP units - shares		191,822												191,822
Net issuances of unvested restricted common stock/OP units - value		2	(2,409)			(2,407)		(2,407)			(2,407)			(2,407)	(2,407)
Conversion of OP units to common stock - shares		21,271											(21,271)	21,271
Conversion of OP units to common stock - value		1	(50)			(49)	49						49	(49)
Vesting of share-based awards			3,656			3,656		3,656			3,656			3,656	3,656
Reallocation of equity to noncontrolling interests/limited partners			(923)			(923)	923						1,013	(1,013)
Common stock dividends					(52,499)	(52,499)		(52,499)
OP unit distributions							(1,194)	(1,194)	(8,481)		(62,174)		(1,194)	(52,499)	(62,174)
Net income					17,649	17,649	175	17,824	8,481		17,856	(32)	207	9,168	17,824
Preferred stock dividends/unit distributions					(8,481)	(8,481)		(8,481)							(8,481)
Reclassification of unrealized loss on equity securities				807		807	18	825		825	825				825
Unrealized loss on equity securities				(3,611)		(3,611)	(81)	(3,692)		(3,692)	(3,692)				(3,692)
Amortization of deferred interest costs				3,447		3,447	78	3,525		3,525	3,525				3,525
Unrealized gain on derivative instruments, net				3,334		3,334	75	3,409		3,409	3,409				3,409
Balance - value at Jun. 30, 2011	222,413	1,313	2,371,762	(66,880)	(264,507)	2,264,101	9,761	2,273,862	222,413	(65,482)	2,274,094	(232)	9,993	2,107,170	2,273,862
Balance - shares at Jun. 30, 2011		131,259,602						131,259,602	9,200,000				2,979,979	131,259,602
Balance - value at Mar. 31, 2011
Net income								7,947							7,947
Preferred stock dividends/unit distributions								(4,241)							(4,241)
Reclassification of unrealized loss on equity securities								825							825
Unrealized loss on equity securities								(1,375)							(1,375)
Balance - value at Jun. 30, 2011	$ 222,413							$ 2,273,862							$ 2,273,862
Balance - shares at Jun. 30, 2011								131,259,602