Earnings Per Share / Common Unit (Tables)

3 Months Ended

Mar. 31, 2019

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended March 31, 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	$	98,105		154,525	$	0.63
Effect of Dilutive Securities:
Stock Based Compensation	—			319	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	98,105		154,844	$	0.63
	Three months ended March 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	$	176,021		154,385	$	1.14
Allocation of undistributed earnings to participating securities	(127		)	—	—
Net income attributable to Boston Properties, Inc. common shareholders	$	175,894		154,385	$	1.14
Effect of Dilutive Securities:
Stock Based Compensation	—			320	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	175,894		154,705	$	1.14

Boston Properties Limited Partnership

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share

	Three months ended March 31, 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	$	113,382	172,131	$	0.66
Effect of Dilutive Securities:
Stock Based Compensation	—		319	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	113,382	172,450	$	0.66

	Three months ended March 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	$	200,907		171,867	$	1.17
Allocation of undistributed earnings to participating securities	(141		)	—	—
Net income attributable to Boston Properties Limited Partnership common unitholders	$	200,766		171,867	$	1.17
Effect of Dilutive Securities:
Stock Based Compensation	—			320	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	200,766		172,187	$	1.17