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Commitments And Contingencies (Details) $ in Thousands	Jan. 24, 2025	Dec. 09, 2024 USD ($)	Mar. 31, 2025 USD ($) ft²	Dec. 31, 2024 USD ($)	Oct. 02, 2023 USD ($) ft²	Jan. 05, 2023 ft²	Dec. 31, 2019 USD ($)
Commitments And Contingencies [Line Items]
Letter of credit and performance obligations			$ 20,300
Note receivable, net			5,535	$ 4,947
Accrued Liabilities		$ 2,200					$ 1,500
Payments for Legal Settlements		$ 2,700
Loss Contingency, Portion Not Accrued			$ 31,000
Loss Contingency, Number of Defendants	90
Construction in Progress
Commitments And Contingencies [Line Items]
Net Rentable Area (in sf) | ft²			3,000,000.0
Boston Properties Limited Partnership
Commitments And Contingencies [Line Items]
Note receivable, net			$ 5,535	$ 4,947
Metropolitan Square
Commitments And Contingencies [Line Items]
Net Rentable Area (in sf) | ft²					657,000
Debt Instrument, Unused Borrowing Capacity, Amount					$ 100,000
Debt Instrument, Interest Rate, Stated Percentage					12.00%
Metropolitan Square | Affiliated Entity
Commitments And Contingencies [Line Items]
Note receivable, net			$ 5,500
Metropolitan Square | Scenario, Plan | Affiliated Entity
Commitments And Contingencies [Line Items]
Loans and Leases Receivable, Loans in Process					$ 20,000
Metropolitan Square | Metropolitan Square
Commitments And Contingencies [Line Items]
Ownership Percentage					20.00%
Office and Life Sciences Building [Member] | 290 Binney Street | Construction in Progress
Commitments And Contingencies [Line Items]
Net Rentable Area (in sf) | ft²						573,000
Consolidated Entities, Ownership Percentage			55.00%
Leased percentage						100.00%
Office and Life Sciences Building [Member] | 250 Binney Street
Commitments And Contingencies [Line Items]
Net Rentable Area (in sf) | ft²			67,000

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