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Real Estate (Tables)
 6 Months Ended
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, 2022December 31, 2021
Land$5,177,647 $5,061,169 
Right of use assets - finance leases237,488 237,507 
Right of use assets - operating leases168,370 169,778 
Land held for future development (1)583,700 560,355 
Buildings and improvements15,242,197 14,291,214 
Tenant improvements3,050,862 2,894,025 
Furniture, fixtures and equipment52,207 51,695 
Construction in progress593,958 894,172 
Total25,106,429 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 improvements505,766 
Tenant improvements58,570 
In-place lease intangibles74,598 
Above-market lease intangibles3,794 
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 IntangiblesAcquired Above-Market Lease IntangiblesAcquired Below-Market Lease Intangibles
Period from May 17, 2022 through December 31, 2022$7,266 $640 $2,011 
202312,200 1,098 3,442 
202410,842 254 3,411 
202510,770 254 3,398 
202610,306 254 3,210 
20279,161 254 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, 2022December 31, 2021
Land$5,082,926 $4,964,986 
Right of use assets - finance leases237,488 237,507 
Right of use assets - operating leases168,370 169,778 
Land held for future development (1)583,700 560,355 
Buildings and improvements14,969,392 14,014,010 
Tenant improvements3,050,862 2,894,025 
Furniture, fixtures and equipment52,207 51,695 
Construction in progress593,958 894,172 
Total24,738,903 23,786,528 
Less: Accumulated depreciation(5,963,676)(5,772,018)
$18,775,227 $18,014,510 
_______________
(1)Includes pre-development costs.