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Noncontrolling Interests (Tables) | 9 Months Ended
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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 |

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