Noncontrolling Interests (Tables)

12 Months Ended

Dec. 31, 2018

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 or payable in 2018:



Record Date	Payment Date	Dividend (Per Share)		Distribution (Per Unit)
December 31, 2018	January 30, 2019		$0.95		$0.95
September 28, 2018	October 31, 2018		$0.95		$0.95
June 29, 2018	July 31, 2018		$0.80		$0.80
March 29, 2018	April 30, 2018		$0.80		$0.80
December 29, 2017	January 30, 2018		$0.80		$0.80

Schedule Of Noncontrolling Interest Property Partnerships [Table Text Block]

The following table reflects the activity of the noncontrolling interests—property partnerships for the years ended December 31, 2018, 2017 and 2016 (in thousands):



Balance at December 31, 2015	$	1,574,400
Capital contributions	10,756
Net loss	(2,068		)
Accumulated other comprehensive loss	(877		)
Distributions	(51,564		)
Balance at December 31, 2016	1,530,647
Capital contributions (1)	161,585
Net income	47,832
Accumulated other comprehensive loss	(2,128		)
Distributions	(54,176		)
Balance at December 31, 2017	1,683,760
Capital contributions	46,701
Net income	62,909
Accumulated other comprehensive income	576
Distributions	(82,501		)
Balance at December 31, 2018	$	1,711,445

Boston Properties Limited Partnership

Entity Information [Line Items]

Schedule Of Noncontrolling Interest Common Units [Table Text Block]

The following table reflects the activity of noncontrolling interests—redeemable common units of Boston Properties Limited Partnership for the years ended December 31, 2018, 2017 and 2016 (in thousands):



Balance at December 31, 2015	$	2,286,689
Contributions	31,395
Net income	59,260
Distributions	(49,087		)
Conversion of redeemable partnership units	(6,461		)
Unearned compensation	(3,464		)
Other comprehensive loss	(4,379		)
Adjustment to reflect redeemable partnership units at redemption value	(51,913		)
Balance at December 31, 2016	2,262,040
Contributions	31,743
Net income	52,210
Distributions	(54,494		)
Conversion of redeemable partnership units	(16,916		)
Unearned compensation	1,650
Cumulative effect of a change in accounting principle	(1,763		)
Other comprehensive income	206
Adjustment to reflect redeemable partnership units at redemption value	17,587
Balance at December 31, 2017	2,292,263
Contributions	34,680
Net income	66,807
Distributions	(62,731		)
Conversion of redeemable partnership units	(2,880		)
Unearned compensation	2,181
Cumulative effect of a change in accounting principle	563
Other comprehensive income	304
Adjustment to reflect redeemable partnership units at redemption value	(330,596		)
Balance at December 31, 2018	$	2,000,591

Noncontrolling Interests [Member]

Entity Information [Line Items]

Dividends Declared [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, 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 5, 2018 issuance date) paid in 2018:



Record Date	Payment Date	Distributions per OP Unit and LTIP Unit		Distributions per MYLTIP Unit
December 31, 2018	January 30, 2019		$0.95		$0.095
September 28, 2018	October 31, 2018		$0.95		$0.095
June 29, 2018	July 31, 2018		$0.80		$0.080
March 29, 2018	April 30, 2018		$0.80		$0.080
December 29, 2017	January 30, 2018		$0.80		$0.080