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Noncontrolling Interests Common units for Boston Properties LImited Partnership (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Noncontrolling Interest [Line Items]
Conversion of redeemable partnership units		$ 0
Accumulated Other Comprehensive Income (Loss)	$ (79,748)	1,848	$ (14,114)	$ (9,304)
Noncontrolling Interests [Member]
Noncontrolling Interest [Line Items]
Conversion of redeemable partnership units	(4,417)	(8,740)
Boston Properties Limited Partnership
Noncontrolling Interest [Line Items]
Accumulated Other Comprehensive Income (Loss)	(91,532)	(528)	$ (18,337)	$ (12,973)
Boston Properties Limited Partnership | Noncontrolling Interests [Member]
Noncontrolling Interest [Line Items]
Beginning balance	2,286,689	2,310,046
Contributions	31,494	39,036
Net Income	32,771	29,530
Distributions	(23,713)	(23,578)
Conversion of redeemable partnership units	(2,664)	(10,843)
Unearned Compensation	(16,617)	(14,881)
Accumulated Other Comprehensive Income (Loss)	(7,561)	1,293
Adjustments To Reflect Redeemable Preferred Units At Redemption Value	86,626	(148,001)
Ending balance	$ 2,387,025	$ 2,182,602

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580

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