Noncontrolling Interests (Tables)

3 Months Ended

Mar. 31, 2018

Noncontrolling Interest [Line Items]

Distributions Declared to OP, LTIP, OPP and MYLTIP Units [Table Text Block]

The following table presents Boston Properties, Inc.’s dividends per share and Boston Properties Limited Partnership’s distributions per OP Unit and LTIP Unit paid in 2018:

Record Date	Payment Date	Dividend (Per Share)		Distribution (Per Unit)
March 29, 2018	April 30, 2018		$0.80		$0.80
December 29, 2017	January 30, 2018		$0.80		$0.80

Schedule Of Noncontrolling Interest Common Units [Table Text Block]

The following table reflects the activity of noncontrolling interests—redeemable partnership units of Boston Properties Limited Partnership for the three months ended March 31, 2018 and 2017 (in thousands):

Balance at December 31, 2017	$	2,292,263
Contributions	34,258
Net income	20,432
Distributions	(14,351		)
Conversion of redeemable partnership units	(832		)
Unearned compensation	(20,453		)
Cumulative effect of a change in accounting principle	563
Other comprehensive income	155
Adjustment to reflect redeemable partnership units at redemption value	(115,432		)
Balance at March 31, 2018	$	2,196,603
Balance at December 31, 2016	$	2,262,040
Contributions	29,918
Net income	11,432
Distributions	(13,653		)
Conversion of redeemable partnership units	(793		)
Unearned compensation	(18,633		)
Cumulative effect of a change in accounting principle	(1,763		)
Other comprehensive income	146
Adjustment to reflect redeemable partnership units at redemption value	126,416
Balance at March 31, 2017	$	2,395,110

Schedule Of Noncontrolling Interest Property Partnerships [Table Text Block]

The following table reflects the activity of the noncontrolling interests—property partnerships for the three months ended March 31, 2018 and 2017 (in thousands):

Balance at December 31, 2017	$	1,683,760
Capital contributions	15,267
Net income	17,234
Accumulated other comprehensive income	144
Distributions	(30,690		)
Balance at March 31, 2018	$	1,685,715
Balance at December 31, 2016	$	1,530,647
Capital contributions	8,145
Net income	4,424
Accumulated other comprehensive income	72
Distributions	(13,635		)
Balance at March 31, 2017	$	1,529,653

Noncontrolling Interests [Member]

Noncontrolling Interest [Line Items]

Distributions Declared to OP, LTIP, OPP and MYLTIP Units [Table Text Block]

The following table presents Boston Properties Limited Partnership’s distributions on the OP Units and LTIP Units (including the 2012 OPP Units, 2013 MYLTIP Units and 2014 MYLTIP Units and, after the February 4, 2018 measurement date, the 2015 MYLTIP Units) and its distributions on the 2015 MYLTIP Units (prior to the February 4, 2018 measurement date), 2016 MYLTIP Units, 2017 MYLTIP Units and 2018 MYLTIP Units (after the February 6, 2018 issuance date) paid in 2018:

Record Date	Payment Date	Distributions per OP Unit and LTIP Unit		Distributions per MYLTIP Unit
March 29, 2018	April 30, 2018		$0.80		$0.080
December 29, 2017	January 30, 2018		$0.80		$0.080