Noncontrolling Interests (Tables)

9 Months Ended

Sep. 30, 2017

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 2017:

Record Date	Payment Date	Dividend (Per Share)		Distribution (Per Unit)
September 29, 2017	October 31, 2017		$0.75		$0.75
June 30, 2017	July 31, 2017		$0.75		$0.75
March 31, 2017	April 28, 2017		$0.75		$0.75
December 31, 2016	January 30, 2017		$0.75		$0.75

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 nine months ended September 30, 2017 and 2016 (in thousands):

Balance at December 31, 2016	$	2,262,040
Contributions	31,465
Net income	40,350
Distributions	(40,292		)
Conversion of redeemable partnership units	(16,812		)
Unearned compensation	(5,194		)
Cumulative effect of a change in accounting principle	(1,763		)
Accumulated other comprehensive income	52
Adjustment to reflect redeemable partnership units at redemption value	(103,556		)
Balance at September 30, 2017	$	2,166,290
Balance at December 31, 2015	$	2,286,689
Contributions	31,492
Net income	42,120
Distributions	(35,500		)
Conversion of redeemable partnership units	(5,881		)
Unearned compensation	(10,072		)
Accumulated other comprehensive loss	(6,877		)
Adjustment to reflect redeemable partnership units at redemption value	151,545
Balance at September 30, 2016	$	2,453,516

Schedule Of Noncontrolling Interest Property Partnerships [Table Text Block]

The following table reflects the activity of the noncontrolling interests in property partnerships for the nine months ended September 30, 2017 and 2016 (in thousands):

Balance at December 31, 2016	$	1,530,647
Capital contributions (1)	147,772
Net income	33,967
Accumulated other comprehensive loss	(2,272		)
Distributions	(41,439		)
Balance at September 30, 2017	$	1,668,675
Balance at December 31, 2015	$	1,574,400
Capital contributions	5,417
Net income	53
Accumulated other comprehensive loss	(16,134		)
Distributions	(38,694		)
Balance at September 30, 2016	$	1,525,042

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 and 2013 MYLTIP Units and, after the February 3, 2017 measurement date, the 2014 MYLTIP Units) and its distributions on the 2014 MYLTIP Units (prior to the February 3, 2017 measurement date), 2015 MYLTIP Units, 2016 MYLTIP Units and 2017 MYLTIP Units (after the February 7, 2017 issuance date) paid in 2017:

Record Date	Payment Date	Distributions per OP Unit and LTIP Unit		Distributions per MYLTIP Unit
September 29, 2017	October 31, 2017		$0.75		$0.075
June 30, 2017	July 31, 2017		$0.75		$0.075
March 31, 2017	April 28, 2017		$0.75		$0.075
December 31, 2016	January 30, 2017		$0.75		$0.075