Earnings Per Share / Common Unit (Tables)

6 Months Ended

Jun. 30, 2019

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended June 30, 2019
	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	$	164,318		154,555	$	1.06
Allocation of undistributed earnings to participating securities	(48		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	164,270		154,555	$	1.06
Effect of Dilutive Securities:
Stock Based Compensation	—			319	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	164,270		154,874	$	1.06
	Three months ended June 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	$	128,681		154,415	$	0.83
Allocation of undistributed earnings to participating securities	(16		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	128,665		154,415	$	0.83
Effect of Dilutive Securities:
Stock Based Compensation	—			156	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	128,665		154,571	$	0.83
	Six months ended June 30, 2019
	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	$	262,431		154,540	$	1.70
Effect of Dilutive Securities:
Stock Based Compensation	—			319	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	262,431		154,859	$	1.69

	Six months ended June 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	$	304,682		154,400	$	1.97
Allocation of undistributed earnings to participating securities	(142		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	304,540		154,400	$	1.97
Effect of Dilutive Securities:
Stock Based Compensation	—			238	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	304,540		154,638	$	1.97

Boston Properties Limited Partnership

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended June 30, 2019
	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	$	185,715		172,202	$	1.08
Allocation of undistributed earnings to participating securities	(54		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	185,661		172,202	$	1.08
Effect of Dilutive Securities:
Stock Based Compensation	—			319	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	185,661		172,521	$	1.08

	Three months ended June 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	$	145,961		171,916	$	0.85
Allocation of undistributed earnings to participating securities	(18		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	145,943		171,916	$	0.85
Effect of Dilutive Securities:
Stock Based Compensation	—			156	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	145,943		172,072	$	0.85
	Six months ended June 30, 2019
	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	$	299,097		172,167	$	1.74
Effect of Dilutive Securities:
Stock Based Compensation	—			319	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	299,097		172,486	$	1.73
	Six months ended June 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	$	346,868		171,892	$	2.02
Allocation of undistributed earnings to participating securities	(158		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	346,710		171,892	$	2.02
Effect of Dilutive Securities:
Stock Based Compensation	—			238	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	346,710		172,130	$	2.01