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Real Estate (Tables) | 12 Months Ended
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Dec. 31, 2021
Real Estate Properties [Line Items] |
Schedule of Real Estate Properties | Boston Properties, Inc. Real estate consisted of the following at December 31, 2021 and December 31, 2020 (in thousands):
|  | December 31, 2021 |  | December 31, 2020
Land |  | $ | 5,061,169 |  |  | $ | 5,069,206 |
Right of use assets - finance leases |  | 237,507 |  |  | 237,393 |
Right of use assets - operating leases (1) |  | 169,778 |  |  | 146,406 |
Land held for future development (2) |  | 560,355 |  |  | 450,954 |
Buildings and improvements |  | 14,291,214 |  |  | 13,777,691 |
Tenant improvements |  | 2,894,025 |  |  | 2,752,880 |
Furniture, fixtures and equipment |  | 51,695 |  |  | 49,606 |
Construction in progress |  | 894,172 |  |  | 868,773 |
Total |  | 24,159,915 |  |  | 23,352,909 |
Less: Accumulated depreciation |  | (5,883,961) |  |  | (5,534,102) |
|  | $ | 18,275,954 |  |  | $ | 17,818,807 |
_______________ (1)See Note 4. (2)Includes pre-development costs.
153 & 211 Second Avenue [Member] |
Real Estate Properties [Line Items] |
Asset Acquisition [Table Text Block] | The following table summarizes the allocation of the purchase price, including transaction costs, of 153 & 211 Second Avenue at the date of acquisition (in thousands):
Land |  | $ | 33,233 |
Building and improvements |  | 53,309 |
Tenant improvements |  | 2,631 |
In-place lease intangibles |  | 13,415 |
Below-market lease intangibles |  | (2,412) |
Net assets acquired |  | $ | 100,176 |
Shady Grove Innovation District [Member] |
Real Estate Properties [Line Items] |
Asset Acquisition [Table Text Block] | The following table summarizes the allocation of the purchase price, including transaction costs, of Shady Grove Innovation District at the date of acquisition (in thousands):
Land |  | $ | 52,030 |
Building and improvements |  | 63,060 |
Tenant improvements |  | 1,152 |
In-place lease intangibles |  | 2,523 |
Above-market lease intangibles |  | 142 |
Below-market lease intangibles |  | (403) |
Net assets acquired |  | $ | 118,504 |
360 Park Avenue South |
Real Estate Properties [Line Items] |
Asset Acquisition [Table Text Block] | The following table summarizes the allocation of the purchase price of 360 Park Avenue South at the date of acquisition (in thousands):
Land |  | $ | 215,448 |
Building and improvements |  | 85,220 |
Net assets acquired |  | $ | 300,668 |
153 & 211 Second Avenue and Shady Grove Innovation District [Member] |
Real Estate Properties [Line Items] |
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination | The following table summarizes the estimated amortization of the acquired in-place lease intangibles and the acquired above/below-market lease intangibles as of December 31, 2021 for 153 & 211 Second Avenue and Shady Grove Innovation District through the last lease expiration (in thousands):
|  | Acquired In-Place Lease Intangibles |  | Acquired Above-Market Lease Intangibles |  | Acquired Below-Market Lease Intangibles
2022 |  | $ | 9,691 |  |  | $ | 74 |  |  | $ | 1,713 |
2023 |  | 151 |  |  | 25 |  |  | 39 |
2024 |  | 56 |  |  | 12 |  |  | 26 |
Boston Properties Limited Partnership |
Real Estate Properties [Line Items] |
Schedule of Real Estate Properties | Boston Properties Limited Partnership Real estate consisted of the following at December 31, 2021 and December 31, 2020 (in thousands):
|  | December 31, 2021 |  | December 31, 2020
Land |  | $ | 4,964,986 |  |  | $ | 4,971,990 |
Right of use assets - finance leases |  | 237,507 |  |  | 237,393 |
Right of use assets - operating leases (1) |  | 169,778 |  |  | 146,406 |
Land held for future development (2) |  | 560,355 |  |  | 450,954 |
Buildings and improvements |  | 14,014,010 |  |  | 13,498,098 |
Tenant improvements |  | 2,894,025 |  |  | 2,752,880 |
Furniture, fixtures and equipment |  | 51,695 |  |  | 49,606 |
Construction in progress |  | 894,172 |  |  | 868,773 |
Total |  | 23,786,528 |  |  | 22,976,100 |
Less: Accumulated depreciation |  | (5,772,018) |  |  | (5,428,576) |
|  | $ | 18,014,510 |  |  | $ | 17,547,524 |
_______________ (1)See Note 4. (2)Includes pre-development costs.

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