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v3.23.3

Stock Option and Incentive Plan Stock and Units (Narrative) (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) shares | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) $ / shares shares | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares issued | shares | 157,018,080 |  | 157,018,080 |  | 156,836,767
Stock based compensation expense | $ 4,800 | $ 7,700 | $ 45,700 | $ 43,200 |
Common Stock, Value, Issued | $ 1,569 |  | $ 1,569 |  | $ 1,568
Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares issued | shares | 73,414 |  | 73,414 |  |
LTIP Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Value Of LTIP Units Issued |  |  | $ 29,400 |  |
Unvested Restricted stock and LTIP Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting |  |  | 4 |  |
Boston Properties Limited Partnership | LTIP Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
LTIP units issued (in shares) | shares | 430,824 |  | 430,824 |  |
Boston Properties Limited Partnership | MYLTIP 2023 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares issued | shares |  |  | 322,053 |  |
Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Employee and director payment per share (in dollars per share) | $ / shares |  |  | $ 0.01 |  |
Common Stock, Value, Issued | $ 5,400 |  | $ 5,400 |  |
LTIP and MYLTIP Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Employee and director payment per share (in dollars per share) | $ / shares |  |  | $ 0.25 |  |
Ltips (including vested MYLTIPS) And Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expenses | 25,100 |  | $ 25,100 |  |
Unvested MYLTIP Units [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expenses | $ 500 |  | $ 500 |  |
Weighted-average period (years) |  |  | 2 years 6 months |  |

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