Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Computation Of Basic And Diluted Earnings Per Share

	For the three months ended March 31, 2015
	Income (Numerator)			Shares (Denominator)	Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	171,182		153,230	$	1.12
Allocation of undistributed earnings to participating securities	(188		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	170,994		153,230	$	1.12
Effect of Dilutive Securities:
Stock Based Compensation	—			643	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	170,994		153,873	$	1.11
	For the three months ended March 31, 2014
	Income (Numerator)			Shares (Denominator)	Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	54,034		153,030	$	0.35
Effect of Dilutive Securities:
Stock Based Compensation	—			139	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	54,034		153,169	$	0.35