Earnings Per Share / Common Unit (Tables)

9 Months Ended

Sep. 30, 2017

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended September 30, 2017
	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	$	117,337		154,355	$	0.76
Allocation of undistributed earnings to participating securities	(7		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	117,330		154,355	$	0.76
Effect of Dilutive Securities:
Stock Based Compensation	—			128	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	117,330		154,483	$	0.76
	Three months ended September 30, 2016
	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	$	76,753		153,754	$	0.50
Effect of Dilutive Securities:
Stock Based Compensation	—			382	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	76,753		154,136	$	0.50
	Nine months ended September 30, 2017
	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	$	348,086		154,132	$	2.26
Allocation of undistributed earnings to participating securities	(15		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	348,071		154,132	$	2.26
Effect of Dilutive Securities:
Stock Based Compensation	—			212	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	348,071		154,344	$	2.26

	Nine months ended September 30, 2016
	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	$	355,114		153,681	$	2.31
Allocation of undistributed earnings to participating securities	(189		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	354,925		153,681	$	2.31
Effect of Dilutive Securities:
Stock Based Compensation	—			290	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	354,925		153,971	$	2.31

Boston Properties Limited Partnership

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended September 30, 2017
	Income (Numerator)			Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	132,693		171,691	$	0.77
Allocation of undistributed earnings to participating securities	(8		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	132,685		171,691	$	0.77
Effect of Dilutive Securities:
Stock Based Compensation	—			128	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	132,685		171,819	$	0.77

	Three months ended September 30, 2016
	Income (Numerator)			Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	91,306		171,379	$	0.53
Effect of Dilutive Securities:
Stock Based Compensation	—			382	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	91,306		171,761	$	0.53
	Nine months ended September 30, 2017
	Income (Numerator)			Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	395,199		171,649	$	2.30
Allocation of undistributed earnings to participating securities	(17		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	395,182		171,649	$	2.30
Effect of Dilutive Securities:
Stock Based Compensation	—			212	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	395,182		171,861	$	2.30
	Nine months ended September 30, 2016
	Income (Numerator)			Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	408,540		171,353	$	2.38
Allocation of undistributed earnings to participating securities	(210		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	408,330		171,353	$	2.38
Effect of Dilutive Securities:
Stock Based Compensation	—			290	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	408,330		171,643	$	2.38