Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Computation Of Basic And Diluted Earnings Per Share

	For the three months ended September 30, 2011
	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.	$	70,542		147,006	$	0.48
Effect of Dilutive Securities:
Stock Based Compensation and Exchangeable Senior Notes		—		616		(0.00	)
Diluted Earnings:
Net income	$	70,542		147,622	$	0.48
	For the three months ended September 30, 2010
	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.	$	57,668		139,595	$	0.41
Effect of Dilutive Securities:
Stock Based Compensation and Exchangeable Senior Notes		—		598		(0.00	)
Diluted Earnings:
Net income	$	57,668		140,193	$	0.41

	For the nine months ended September 30, 2011
	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.	$	171,359		145,006	$	1.18
Effect of Dilutive Securities:
Stock Based Compensation		—		619		(0.00	)
Diluted Earnings:
Net income	$	171,359		145,625	$	1.18
	For the nine months ended September 30, 2010
	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc.	$	171,786		139,215	$	1.23
Effect of Dilutive Securities:
Stock Based Compensation		—		659		(0.00	)
Diluted Earnings:
Net income	$	171,786		139,874	$	1.23