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Related Party Transactions (Details) $ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) ft² shares | Dec. 31, 2023 USD ($) ft² nonemployeedirectors shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) | Jun. 05, 2023 USD ($) ft² | Jun. 04, 2023 USD ($) | Dec. 16, 2021 shares
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest and Other Income |  | $ 69,964 | $ 11,940 | $ 5,704 |  |  |
Number Of Non Employee Directors Electing To Receive Deferred Stock Units | nonemployeedirectors |  | 8 |  |  |  |  |
Separate Unrestricted Cash For Deferred Compensation Plan. | $ 36,100 | $ 36,100 | 32,300 |  |  |  |
Liability for directors | $ 458,329 | $ 458,329 | $ 417,545 |  |  |  |
Common stock, shares issued | shares | 157,019,766 | 157,019,766 | 156,836,767 |  |  |  |
Reedemable deferred stock units, units | shares | 119,471 | 119,471 | 97,853 |  |  |  |
500 North Capitol Street, NW | Unconsolidated Properties |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  | 231,000 |  |
Ownership Percentage |  |  |  |  | 30.00% |  |
Debt |  |  |  |  | $ 105,000 | $ 105,000 |
Debt, Weighted Average Interest Rate |  |  |  |  | 6.83% |  |
Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Related party note receivable, net | $ 88,779 | $ 88,779 | $ 78,576 |  |  |  |
Related Party | 500 North Capitol Street, NW | Unconsolidated Properties |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Debt |  |  |  |  | $ 105,000 |  |
Debt, Weighted Average Interest Rate |  |  |  |  | 6.83% |  |
Related Party | 500 North Capitol Street, NW | Unconsolidated Properties | Notes Receivables [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest and Other Income |  | 600 |  |  |  |  |
Related party note receivable, net |  |  |  |  | $ 10,500 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 8.03% |  |
Boston Properties Limited Partnership |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest and Other Income |  | 69,964 | 11,940 | 5,704 |  |  |
Liability for directors | $ 458,329 | $ 458,329 | $ 417,545 |  |  |  |
Reedemable deferred stock units, units | shares | 119,471 | 119,471 | 97,853 |  |  |  |
Boston Properties Limited Partnership | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Related party note receivable, net | $ 88,779 | $ 88,779 | $ 78,576 |  |  |  |
3 Hudson Boulevard [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² | 2,000,000 | 2,000,000 |  |  |  |  |
Ownership Percentage | 25.00% | 25.00% |  |  |  |  |
3 Hudson Boulevard [Member] | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Interest and Other Income |  | $ 8,900 | 5,600 | 3,600 |  |  |
Director Cessation Member [Member] | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Common stock, shares issued | shares |  |  |  |  |  |  | 498
Related Party | 3 Hudson Boulevard [Member] | Unconsolidated Properties | Notes Receivables [Member] |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Related party note receivable, net | $ 80,000 | 80,000 |  |  |  |  |
Related Party | 3 Hudson Boulevard [Member] | Unconsolidated Properties | Notes Receivables [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.61% |  |  |  |  |  |
Director | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Separate Unrestricted Cash For Deferred Compensation Plan. | $ 800 | 800 | 600 |  |  |  |
Liability for directors | $ 800 | 800 | 600 |  |  |  |
Real Estate Brokerage Firm | Related Party |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Operating Costs and Expenses |  | $ 500 | $ 1,600 | $ 1,900 |  |  |

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