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v3.21.2

Consolidated Statement of Capital and Noncontrolling Interests - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2019
Common Stock, Shares, Outstanding | 156,206,491 |  | 156,206,491 |  |  | 155,718,825 |  |
Effective portion of interest rate contracts | $ 1,088 | $ 1,027 | $ 5,482 | $ (9,352) |  |  |  |
Amortization of interest rate contracts | 1,676 | 1,677 | 5,028 | 5,020 |  |  |  |
Contributions from noncontrolling interests in property partnerships | 11,318 | 1,407 | 13,738 | 7,364 |  |  |  |
Distributions to noncontrolling interests in property partnerships | (27,675) | (11,026) | (65,604) | (40,091) |  |  |  |
Preferred Stock Redemption Charge | 0 | 0 | (6,412) | 0 |  |  |  |
Net activity from stock option and incentive plan, value | $ 8,864 | $ 8,639 | $ 60,228 | $ 41,924 |  |  |  |
Accounting Standards Update 2018-09 |  |  |  |  |  |  |  |
Accounting Standards Update [Extensible List] |  |  |  | Accounting Standards Update 2018-09 |  |  |  |
General Partner [Member] |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | 1,737,000 | 1,731,000 | 1,737,000 | 1,731,000 | 1,737,000 | 1,731,000 | 1,731,000 | 1,727,000
Net activity from stock option and incentive plan, shares |  |  | 4,000 | 1,000 |  |  |  |
Conversion of redeemable partnership units |  |  | 2,000 | 3,000 |  |  |  |
Limited Partner [Member] |  |  |  |  |  |  |  |
Common Stock, Shares, Outstanding | 154,470,000 | 153,905,000 | 154,470,000 | 153,905,000 | 154,399,000 | 153,988,000 | 153,891,000 | 153,063,000
Net activity from stock option and incentive plan, shares | 21,000 | 5,000 | 255,000 | 73,000 |  |  |  |
Conversion of redeemable partnership units | 50,000 | 9,000 | 227,000 | 769,000 |  |  |  |
Partners' Capital (General and Limited Partners)[Member] |  |  |  |  |  |  |  |
Beginning Balance | $ 4,209,117 | $ 4,943,849 | $ 4,209,117 | $ 4,943,849 | $ 4,132,880 | $ 4,554,639 | $ 4,828,066 | $ 3,380,175
Contributions, value | 1,705 | 1,824 | 21,900 | 10,405 |  |  |  |
Allocated net income for the period | 110,043 | 92,059 | 324,652 | 872,842 |  |  |  |
Distributions | (153,082) | (152,518) | (459,048) | (457,233) |  |  |  |
Conversion of redeemable partnership units, value | 1,748 | 338 | 8,033 | 26,682 |  |  |  |
Adjustment to reflect redeemable partnership units at redemption value | 115,823 | 174,080 | (234,647) | 1,112,483 |  |  |  |
Preferred Stock Redemption Charge |  |  | (6,412) |  |  |  |  |
Partners' Capital (General and Limited Partners)[Member] | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Beginning Balance |  |  |  |  |  |  |  | (1,505)
Preferred Units [Member] |  |  |  |  |  |  |  |
Beginning Balance | 0 | 193,623 | 0 | 193,623 | 0 | 193,623 | 193,623 | 193,623
Allocated net income for the period |  | 2,625 | 2,560 | 7,875 |  |  |  |
Distributions |  | (2,625) | (2,560) | (7,875) |  |  |  |
Preferred Units [Member] | Boston Properties Limited Partnership |  |  |  |  |  |  |  |
Preferred Stock, Redemption Amount | (193,623) |  | (193,623) |  |  |  |  |
Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |
Beginning Balance | (40,803) | (52,622) | (40,803) | (52,622) | (43,166) | (49,890) | (54,921) | (48,335)
Effective portion of interest rate contracts | 981 | 917 | 4,943 | (8,416) |  |  |  |
Amortization of interest rate contracts | 1,382 | 1,382 | 4,144 | 4,129 |  |  |  |
Noncontrolling interest - property partnerships [Member] |  |  |  |  |  |  |  |
Beginning Balance | 1,728,101 | 1,730,674 | 1,728,101 | 1,730,674 | 1,725,343 | 1,726,933 | 1,724,588 | 1,728,689
Allocated net income for the period | 18,971 | 15,561 | 52,602 | 34,280 |  |  |  |
Amortization of interest rate contracts | 144 | 144 | 432 | 432 |  |  |  |
Contributions from noncontrolling interests in property partnerships | 11,318 | 1,407 | 13,738 | 7,364 |  |  |  |
Distributions to noncontrolling interests in property partnerships | (27,675) | (11,026) | (65,604) | (40,091) |  |  |  |
Total Capital [Member] |  |  |  |  |  |  |  |
Beginning Balance | 5,896,415 | 6,815,524 | 5,896,415 | 6,815,524 | 5,815,057 | 6,425,305 | 6,691,356 | 5,254,152
Contributions, value | 1,705 | 1,824 | 21,900 | 10,405 |  |  |  |
Allocated net income for the period | 129,014 | 110,245 | 379,814 | 914,997 |  |  |  |
Distributions | (153,082) | (155,143) | (461,608) | (465,108) |  |  |  |
Conversion of redeemable partnership units, value | 1,748 | 338 | 8,033 | 26,682 |  |  |  |
Adjustment to reflect redeemable partnership units at redemption value | 115,823 | 174,080 | (234,647) | 1,112,483 |  |  |  |
Effective portion of interest rate contracts | 981 | 917 | 4,943 | (8,416) |  |  |  |
Amortization of interest rate contracts | 1,526 | 1,526 | 4,576 | 4,561 |  |  |  |
Contributions from noncontrolling interests in property partnerships | 11,318 | 1,407 | 13,738 | 7,364 |  |  |  |
Distributions to noncontrolling interests in property partnerships | (27,675) | (11,026) | (65,604) | (40,091) |  |  |  |
Preferred Stock, Redemption Amount | (193,623) |  | (193,623) |  |  |  |  |
Preferred Stock Redemption Charge |  |  | (6,412) |  |  |  |  |
Total Capital [Member] | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Beginning Balance |  |  |  |  |  |  |  | (1,505)
Noncontrolling interest - Redeemable partnership units [Member] |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount | 1,893,611 | 1,406,484 | 1,893,611 | 1,406,484 | $ 2,008,478 | $ 1,643,024 | $ 1,581,010 | 2,468,753
Contributions, value | 7,679 |  | 39,332 | 32,278 |  |  |  |
Allocated net income for the period | 11,971 | 9,565 | 35,393 | 97,090 |  |  |  |
Distributions | (17,203) | (17,183) | (51,743) | (51,821) |  |  |  |
Conversion of redeemable partnership units, value | (1,748) | (338) | (8,033) | (26,682) |  |  |  |
Adjustment to reflect redeemable partnership units at redemption value | (115,823) | (174,080) | 234,647 | (1,112,483) |  |  |  |
Effective portion of interest rate contracts | 107 | 110 | 539 | (936) |  |  |  |
Amortization of interest rate contracts | 150 | 151 | 452 | 459 |  |  |  |
Contributions from noncontrolling interests in property partnerships | 0 | 0 | 0 | 0 |  |  |  |
Distributions to noncontrolling interests in property partnerships | 0 | 0 | 0 | $ 0 |  |  |  |
Preferred Stock, Redemption Amount | $ 0 |  | 0 |  |  |  |  |
Preferred Stock Redemption Charge |  |  | 0 |  |  |  |  |
Net activity from stock option and incentive plan, value |  | $ 7,249 |  |  |  |  |  |
Noncontrolling interest - Redeemable partnership units [Member] | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount |  |  |  |  |  |  |  | $ (174)
Dividends In Excess Of Earnings [Member] |  |  |  |  |  |  |  |
Preferred Stock Redemption Charge |  |  | $ (6,412) |  |  |  |  |

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