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Real Estate Schedule of Real Estate Properties (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Real Estate Properties [Line Items] |  |  |
Land |  | $ 5,068,843 | $ 5,069,206
Right-of-use assets - finance leases |  | 237,017 | 237,393
Right of use assets - operating leases |  | 144,143 | 146,406
Land held for future development | [1] | 421,349 | 450,954
Buildings and improvements |  | 14,004,418 | 13,777,691
Tenant improvements |  | 2,816,726 | 2,752,880
Furniture, Fixtures and Equipment |  | 51,549 | 49,606
Construction in progress |  | 794,039 | 868,773
Total |  | 23,538,084 | 23,352,909
Less: accumulated depreciation |  | (5,665,061) | (5,534,102)
Total real estate |  | 17,873,023 | 17,818,807
Boston Properties Limited Partnership |  |  |
Real Estate Properties [Line Items] |  |  |
Land |  | 4,971,990 | 4,971,990
Right-of-use assets - finance leases |  | 237,017 | 237,393
Right of use assets - operating leases |  | 144,143 | 146,406
Land held for future development | [1] | 421,349 | 450,954
Buildings and improvements |  | 13,725,776 | 13,498,098
Tenant improvements |  | 2,816,726 | 2,752,880
Furniture, Fixtures and Equipment |  | 51,549 | 49,606
Construction in progress |  | 794,039 | 868,773
Total |  | 23,162,589 | 22,976,100
Less: accumulated depreciation |  | (5,557,784) | (5,428,576)
Total real estate |  | $ 17,604,805 | $ 17,547,524
[1] | Includes pre-development costs.

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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977 + Details
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- Definition Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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