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Real Estate (Tables) | 6 Months Ended
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Jun. 30, 2022
Real Estate Properties [Line Items] |
Schedule of Real Estate Properties | BXP Real estate consisted of the following at June 30, 2022 and December 31, 2021 (in thousands):
|  | June 30, 2022 |  | December 31, 2021
Land |  | $ | 5,177,647 |  |  | $ | 5,061,169 |
Right of use assets - finance leases |  | 237,488 |  |  | 237,507 |
Right of use assets - operating leases |  | 168,370 |  |  | 169,778 |
Land held for future development (1) |  | 583,700 |  |  | 560,355 |
Buildings and improvements |  | 15,242,197 |  |  | 14,291,214 |
Tenant improvements |  | 3,050,862 |  |  | 2,894,025 |
Furniture, fixtures and equipment |  | 52,207 |  |  | 51,695 |
Construction in progress |  | 593,958 |  |  | 894,172 |
Total |  | 25,106,429 |  |  | 24,159,915 |
Less: Accumulated depreciation |  | (6,077,270) |  |  | (5,883,961) |
|  | $ | 19,029,159 |  |  | $ | 18,275,954 |
_______________ (1)Includes pre-development costs.
Madison Centre |
Real Estate Properties [Line Items] |
Asset Acquisition [Table Text Block] | The following table summarizes the allocation of the purchase price, including transaction costs, of Madison Centre at the date of acquisition (in thousands):
Land |  | $ | 104,641 |
Building and improvements |  | 505,766 |
Tenant improvements |  | 58,570 |
In-place lease intangibles |  | 74,598 |
Above-market lease intangibles |  | 3,794 |
Below-market lease intangibles |  | (23,114) |
Net assets acquired |  | $ | 724,255 |
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination | The following table summarizes the estimated annual amortization of the acquired in-place lease intangibles and the acquired above- and below-market lease intangibles for Madison Centre from May 17, 2022 through the remainder of 2022 and each of the five succeeding fiscal years (in thousands):
|  | Acquired In-Place Lease Intangibles |  | Acquired Above-Market Lease Intangibles |  | Acquired Below-Market Lease Intangibles
Period from May 17, 2022 through December 31, 2022 |  | $ | 7,266 |  |  | $ | 640 |  |  | $ | 2,011 |
2023 |  | 12,200 |  |  | 1,098 |  |  | 3,442 |
2024 |  | 10,842 |  |  | 254 |  |  | 3,411 |
2025 |  | 10,770 |  |  | 254 |  |  | 3,398 |
2026 |  | 10,306 |  |  | 254 |  |  | 3,210 |
2027 |  | 9,161 |  |  | 254 |  |  | 2,805 |
Boston Properties Limited Partnership |
Real Estate Properties [Line Items] |
Schedule of Real Estate Properties | BPLP Real estate consisted of the following at June 30, 2022 and December 31, 2021 (in thousands):
|  | June 30, 2022 |  | December 31, 2021
Land |  | $ | 5,082,926 |  |  | $ | 4,964,986 |
Right of use assets - finance leases |  | 237,488 |  |  | 237,507 |
Right of use assets - operating leases |  | 168,370 |  |  | 169,778 |
Land held for future development (1) |  | 583,700 |  |  | 560,355 |
Buildings and improvements |  | 14,969,392 |  |  | 14,014,010 |
Tenant improvements |  | 3,050,862 |  |  | 2,894,025 |
Furniture, fixtures and equipment |  | 52,207 |  |  | 51,695 |
Construction in progress |  | 593,958 |  |  | 894,172 |
Total |  | 24,738,903 |  |  | 23,786,528 |
Less: Accumulated depreciation |  | (5,963,676) |  |  | (5,772,018) |
|  | $ | 18,775,227 |  |  | $ | 18,014,510 |
_______________ (1)Includes pre-development costs.

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