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Organization (Details) ft² in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 | Sep. 30, 2024 ft² Real_Estate_Properties yr shares | Sep. 30, 2024 ft² Real_Estate_Properties yr shares
Real Estate Properties [Line Items] |  |  |
Restriction on redemption of OP units from date of issuance (years) | yr |  | 1 | 1
One OP unit is equivalent to one share of Common Stock (in shares) | shares |  | 1 | 1
OP unit conversion rate (in shares) | shares |  | 1 | 1
2012 OPP Units and Vested MYLTIPs |  |  |
Real Estate Properties [Line Items] |  |  |
Vesting Period |  |  | 3 years
Construction in Progress |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 9 | 9
Net Rentable Area (in sf) | ft² |  | 2.7 | 2.7
Commercial Real Estate Properties [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 184 | 184
Net Rentable Area (in sf) | ft² |  | 53.0 | 53.0
Office and Life Sciences Building [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 162 | 162
Office and Life Sciences Building [Member] | Construction in Progress |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 6 | 6
Retail Site [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 14 | 14
Retail Site [Member] | Construction in Progress |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 1 | 1
Residential Building |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 7 | 7
Residential Building | Construction in Progress |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 2 | 2
Hotel [Member] |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties |  | 1 | 1
Boston Properties Limited Partnership |  |  |
Real Estate Properties [Line Items] |  |  |
General and limited partnership interest in the operating partnership (percent) | 89.40% | 89.60% |

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