Earnings Per Share / Common Unit (Tables)

12 Months Ended

Dec. 31, 2018

Computation Of Basic And Diluted Earnings Per Share / Unit



	For the Year Ended December 31, 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	$	572,347		154,427	$	3.71
Allocation of undistributed earnings to participating securities	(101		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	572,246		154,427	$	3.71
Effect of Dilutive Securities:
Stock Based Compensation	—			255	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	572,246		154,682	$	3.70

	For the Year Ended December 31, 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	$	451,939		154,190	$	2.93
Effect of Dilutive Securities:
Stock Based Compensation	—			200	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	451,939		154,390	$	2.93

	For the Year Ended December 31, 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	$	502,285		153,715	$	3.27
Allocation of undistributed earnings to participating securities	(283		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	502,002		153,715	$	3.27
Effect of Dilutive Securities:
Stock Based Compensation	—			262	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	502,002		153,977	$	3.26

Boston Properties Limited Partnership

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share / Unit

Included in the number of units (the denominator) below are approximately 17,485,000, 17,471,000 and 17,646,000 redeemable common units for the years ended December 31, 2018, 2017 and 2016, respectively.



	For the Year Ended December 31, 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	$	656,903		171,912	$	3.82
Allocation of undistributed earnings to participating securities	(113		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	656,790		171,912	$	3.82
Effect of Dilutive Securities:
Stock Based Compensation	—			255	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	656,790		172,167	$	3.81



	For the Year Ended December 31, 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	$	512,866	171,661	$	2.99
Effect of Dilutive Securities:
Stock Based Compensation	—		200	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	512,866	171,861	$	2.98



	For the Year Ended December 31, 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	$	575,341		171,361	$	3.36
Allocation of undistributed earnings to participating securities	(316		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	575,025		171,361	$	3.36
Effect of Dilutive Securities:
Stock Based Compensation	—			262	(0.01		)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	575,025		171,623	$	3.35