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Real Estate Schedule of Real Estate Properties (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Real Estate Properties [Line Items] |  |
Land | $ 4,806,021 | $ 4,785,772
Land held for future development | 252,195 | 268,114
Buildings and improvements | 11,709,285 | 11,666,105
Tenant improvements | 1,920,247 | 1,752,115
Furniture, fixtures and equipment | 29,852 | 27,986
Construction in progress | 763,935 | 736,311
Total | 19,481,535 | 19,236,403
Less: accumulated depreciation | (3,925,894) | (3,547,659)
Total real estate | 15,555,641 | 15,688,744
Boston Properties Limited Partnership [Member] |  |
Real Estate Properties [Line Items] |  |
Land | 4,700,793 | 4,680,181
Land held for future development | 252,195 | 268,114
Buildings and improvements | 11,394,119 | 11,349,851
Tenant improvements | 1,920,247 | 1,752,115
Furniture, fixtures and equipment | 29,852 | 27,986
Construction in progress | 763,935 | 736,311
Total | 19,061,141 | 18,814,558
Less: accumulated depreciation | (3,846,816) | (3,476,321)
Total real estate | $ 15,214,325 | $ 15,338,237

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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://www.xbrl.org/2003/role/presentationRef -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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