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v3.22.4

Subsequent Events (Details) $ in Thousands |  |  |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 07, 2023 shares | Feb. 03, 2023 USD ($) shares | Jan. 31, 2023 USD ($) a ft² | Jan. 04, 2023 USD ($) | Dec. 31, 2022 ft² shares | Dec. 31, 2022 ft² shares | Dec. 31, 2021 shares | Dec. 31, 2020 shares | Jan. 30, 2023 ft² | Jan. 25, 2023 USD ($) shares | Jan. 05, 2023 ft² | Sep. 08, 2022 ft² | Jun. 15, 2021 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit, Additional Borrowing Capacity | $ |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  | 0.775% |  |  |  |  |  |  |  |
Common stock, shares issued |  |  |  |  | 156,836,767 | 156,836,767 | 156,623,749 |  |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued |  |  |  |  | 41,818 | 41,818 | 57,383 | 29,630 |  |  |  |  |
Boston Properties Limited Partnership | LTIP Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued |  |  |  |  |  | 280,616 | 281,640 | 207,181 |  |  |  |  |
Construction in Progress |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  | 3,200,000 | 3,200,000 |  |  |  |  |  |  |
300 Binney Street |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  |  |  |  |  |  |  |  | 195,000 |
300 Binney Street | Construction in Progress |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  |  |  |  |  |  |  |  | 240,000 |
Subsequent Event [Member] | 2023 Unsecured Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ |  |  |  | $ 1,200,000 |  |  |  |  |  |  |  |  |
Line of Credit, Additional Borrowing Capacity | $ |  |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Number of extensions |  |  |  | 1 |  |  |  |  |  |  |  |  |
Extension Option (in months) |  |  |  | 12 |  |  |  |  |  |  |  |  |
Proceeds from Unsecured Lines of Credit | $ |  |  |  | $ 1,200,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate Terms |  |  |  | At BPLP’s option, loans under the 2023 Unsecured Term Loan will bear interest at a rate per annum equal to (1) a base rate equal to the greatest of (a) the Federal Funds rate plus 1/2 of 1%, (b) the administrative agent’s prime rate, (c) Term SOFR for a one-month period plus 1.00%, and (d) 1.00%, in each case, plus a margin ranging from 0 to 60 basis points based on BPLP’s credit rating; or (2) a rate equal to adjusted Term SOFR with a one-month period plus a margin ranging from 75 to 160 basis points based on BPLP’s credit rating. |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | 2023 Unsecured Term Loan | Base Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | 2023 Unsecured Term Loan | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 0.85% |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Minimum [Member] | 2023 Unsecured Term Loan |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Additional Term Loans |  |  |  | 1 |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued |  | 64,731 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | MYLTIP 2023 |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Value of MYLTIP Awards | $ |  |  |  |  |  |  |  |  |  | $ 13,100 |  |  |
Subsequent Event [Member] | MYLTIP 2023 | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock available for issuance |  |  |  |  |  |  |  |  |  | 0 |  |  |
Subsequent Event [Member] | MYLTIP 2023 | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock available for issuance |  |  |  |  |  |  |  |  |  | 322,053 |  |  |
Subsequent Event [Member] | MYLTIP 2023 | Target |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock available for issuance |  |  |  |  |  |  |  |  |  | 161,026 |  |  |
Subsequent Event [Member] | MYLTIP 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Final awards percentage of target |  | 50.00% |  |  |  |  |  |  |  |  |  |  |
Value of MYLTIP Awards | $ |  | $ 3,800 |  |  |  |  |  |  |  |  |  |  |
Forfeitures, in units |  | 152,460 |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Boston Properties Limited Partnership | LTIP Units [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued | 401,543 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | 290 Binney | Construction in Progress |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  |  |  |  |  |  |  | 566,000 |  |
Leased percentage |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Subsequent Event [Member] | 300 Binney Street |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  |  |  |  |  | 195,000 |  |  |  |
Subsequent Event [Member] | 300 Binney Street | Construction in Progress |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  |  |  |  |  |  |  | 240,000 |  |  |  |
Leased percentage |  |  |  |  |  |  |  |  | 100.00% |  |  |  |
Subsequent Event [Member] | Worldgate Drive |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Net Rentable Area (in sf) | ft² |  |  | 350,000 |  |  |  |  |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | $ |  |  | $ 17,000 |  |  |  |  |  |  |  |  |  |
Ownership Percentage |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Number of buildings |  |  | 2 |  |  |  |  |  |  |  |  |  |
Number of parking space |  |  | 1,200 |  |  |  |  |  |  |  |  |  |
Area of Land | a |  |  | 10 |  |  |  |  |  |  |  |  |  |

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