Consolidated Statements Of Comprehensive Income (USD $) In Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Comprehensive Income [Abstract]
Net income	$ 80,451	$ 68,089	$ 198,383	$ 203,083
Other comprehensive income:
Effective portion of interest rate contracts				421
Amortization of interest rate contracts	649	716	1,946	2,157
Other comprehensive income	649	716	1,946	2,578
Comprehensive income	81,100	68,805	200,329	205,661
Net income attributable to noncontrolling interests	(9,909)	(10,421)	(27,024)	(31,297)
Other comprehensive income attributable to noncontrolling interests	(72)	(91)	(227)	(331)
Comprehensive income attributable to Boston Properties, Inc.	$ 71,119	$ 58,293	$ 173,078	$ 174,033

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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