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Consolidated Statements Of Operations - USD ($)
shares in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenue      
Lease $ 2,646,261,000 $ 2,758,014,000  
Base rent     $ 2,103,723,000
Recoveries from tenants     402,066,000
Total revenue 2,765,686,000 2,960,562,000 2,717,076,000
Expenses      
Rental 1,017,208,000 1,050,010,000 979,151,000
General and administrative 133,112,000 140,777,000 121,722,000
Transaction costs 1,531,000 1,984,000 1,604,000
Depreciation, Depletion and Amortization 683,751,000 677,764,000 645,649,000
Depreciation and amortization 683,751,000 677,764,000 645,649,000
Total expenses 1,860,364,000 1,914,925,000 1,791,579,000
Other income (expense)      
Income (Loss) from Unconsolidated Joint Ventures (85,110,000) 46,592,000 2,222,000
Gains (losses) on sales of real estate 618,982,000 709,000 182,356,000
Interest and other income (loss) 5,953,000 18,939,000 10,823,000
Gains (losses) from investments in securities 5,261,000 6,417,000 (1,865,000)
Impairment loss 0 (24,038,000) (11,812,000)
Loss from early extinguishment of debt 0 (29,540,000) (16,490,000)
Interest expense (431,717,000) (412,717,000) (378,168,000)
Net income 1,018,691,000 651,999,000 712,563,000
Net (income) loss attributable to noncontrolling interests      
Noncontrolling interests in property partnerships (48,260,000) (71,120,000) (62,909,000)
Noncontrolling interest - common units of the Operating Partnership (97,704,000) (59,345,000) (66,807,000)
Net income attributable to the Company 872,727,000 521,534,000 582,847,000
Preferred dividends / distributions (10,500,000) (10,500,000) (10,500,000)
Net income attributable to the company's common shareholders / unitholders $ 862,227,000 $ 511,034,000 $ 572,347,000
Basic earnings per common share / unit attributable to the Company      
Earnings Per Share After Allccation of Undistributed Earnings to Particiapting Securities Basic (dollars per share) $ 5.54   $ 3.71
Net income (in dollars per share / unit) $ 5.55 $ 3.31 $ 3.71
Weighted average number of common shares / units outstanding (in shares / units) 155,432 154,582 154,427
Diluted earnings per common share / unit attributable to the Company      
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) $ 5.54 $ 3.30 $ 3.70
Weighted average number of common and common equivalent shares / units outstanding (in shares / units) 155,517 154,883 154,682
Boston Properties Limited Partnership      
Revenue      
Lease $ 2,646,261,000 $ 2,758,014,000  
Base rent     $ 2,103,723,000
Recoveries from tenants     402,066,000
Total revenue 2,765,686,000 2,960,562,000 2,717,076,000
Expenses      
Rental 1,017,208,000 1,050,010,000 979,151,000
General and administrative 133,112,000 140,777,000 121,722,000
Transaction costs 1,531,000 1,984,000 1,604,000
Depreciation, Depletion and Amortization 676,666,000 669,956,000 637,891,000
Depreciation and amortization 676,666,000 669,956,000  
Total expenses 1,853,279,000 1,907,117,000 1,783,821,000
Other income (expense)      
Income (Loss) from Unconsolidated Joint Ventures (85,110,000) 46,592,000 2,222,000
Gains (losses) on sales of real estate 631,945,000 858,000 190,716,000
Interest and other income (loss) 5,953,000 18,939,000 10,823,000
Gains (losses) from investments in securities 5,261,000 6,417,000 (1,865,000)
Impairment loss 0 (22,272,000) (10,181,000)
Loss from early extinguishment of debt 0 (29,540,000) (16,490,000)
Interest expense (431,717,000) (412,717,000) (378,168,000)
Net income 1,038,739,000 661,722,000 730,312,000
Net (income) loss attributable to noncontrolling interests      
Noncontrolling interests in property partnerships (48,260,000) (71,120,000) (62,909,000)
Net income attributable to the Company 990,479,000 590,602,000 667,403,000
Preferred dividends / distributions (10,500,000) (10,500,000) (10,500,000)
Net income attributable to the company's common shareholders / unitholders $ 979,979,000 $ 580,102,000 $ 656,903,000
Basic earnings per common share / unit attributable to the Company      
Earnings Per Share After Allccation of Undistributed Earnings to Particiapting Securities Basic (dollars per share) $ 5.67   $ 3.82
Net income (in dollars per share / unit) $ 5.68 $ 3.37 $ 3.82
Weighted average number of common shares / units outstanding (in shares / units) 172,643 172,200 171,912
Diluted earnings per common share / unit attributable to the Company      
Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) $ 5.67 $ 3.36 $ 3.81
Weighted average number of common and common equivalent shares / units outstanding (in shares / units) 172,728 172,501 172,167
Parking and Other [Member]      
Revenue      
Other revenue $ 70,680,000 $ 103,534,000 $ 107,421,000
Parking and Other [Member] | Boston Properties Limited Partnership      
Revenue      
Other revenue 70,680,000 103,534,000 107,421,000
Hotel [Member]      
Revenue      
Other revenue [1] 7,478,000 48,589,000 49,118,000
Expenses      
Operating expense 13,136,000 34,004,000 33,863,000
Hotel [Member] | Boston Properties Limited Partnership      
Revenue      
Other revenue 7,478,000 48,589,000 49,118,000
Expenses      
Operating expense 13,136,000 34,004,000 33,863,000
Real Estate, Other [Member]      
Revenue      
Other revenue 11,626,000 10,386,000 9,590,000
Expenses      
Operating expense 11,626,000 10,386,000 9,590,000
Real Estate, Other [Member] | Boston Properties Limited Partnership      
Revenue      
Other revenue 11,626,000 10,386,000 9,590,000
Expenses      
Operating expense 11,626,000 10,386,000 9,590,000
Management Service [Member]      
Revenue      
Other revenue 29,641,000 40,039,000 45,158,000
Management Service [Member] | Boston Properties Limited Partnership      
Revenue      
Other revenue $ 29,641,000 $ 40,039,000 $ 45,158,000
[1] Rental Revenue is equal to Total Revenue per the Company’s Consolidated Statements of Operations, less Development and Management Services Revenue and Direct Reimbursements of Payroll and Related Costs from Management Services Contracts Revenue per the Consolidated Statements of Operations.