Earnings Per Share / Common Unit (Tables)

9 Months Ended

Sep. 30, 2018

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended September 30, 2018
	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	$	119,118		154,440	$	0.77
Effect of Dilutive Securities:
Stock Based Compensation	—			238	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	119,118		154,678	$	0.77
	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
	Nine months ended September 30, 2018
	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	$	423,835		154,414	$	2.74
Allocation of undistributed earnings to participating securities	(87		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	423,748		154,414	$	2.74
Effect of Dilutive Securities:
Stock Based Compensation	—			238	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	423,748		154,652	$	2.74

	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

Boston Properties Limited Partnership

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended September 30, 2018
	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	$	136,201	171,928	$	0.79
Effect of Dilutive Securities:
Stock Based Compensation	—		238	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	136,201	172,166	$	0.79

	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
	Nine months ended September 30, 2018
	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	$	483,069		171,904	$	2.81
Allocation of undistributed earnings to participating securities	(97		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	482,972		171,904	$	2.81
Effect of Dilutive Securities:
Stock Based Compensation	—			238	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	482,972		172,142	$	2.81
	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