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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,592,019 and $6,497,031 at December 31, 2020 and December 31, 2019, respectively) $ 22,969,110 $ 22,502,976
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2020 and December 31, 2019, respectively) 237,393 237,394
Less: accumulated depreciation (amounts related to VIEs of $(1,158,548) and $(1,058,495) at December 31, 2020 and December 31, 2019, respectively) (5,534,102) (5,266,798)
Cash and cash equivalents (amounts related to VIEs of $340,642 and $280,033 at December 31, 2020 and December 31, 2019, respectively) 1,668,742 644,950
Tenant and other receivables, net (amounts related to VIEs of $10,911 and $28,918 at December 31, 2020 and December 31, 2019, respectively) 77,411 112,807
Accrued rental income, net (amounts related to VIEs of $336,594 and $298,318 at December 31, 2020 and December 31, 2019, respectively) 1,122,502 1,038,788
Deferred charges, net (amounts related to VIEs of $183,306 and $214,769 at December 31, 2020 and December 31, 2019, respectively) 640,085 689,213
Prepaid expenses and other assets (amounts related to VIEs of $13,137 and $20,931 at December 31, 2020 and December 31, 2019, respectively) 33,840 41,685
Mortgage notes payable, net (amounts related to VIEs of $2,907,590 and $2,918,806 at December 31, 2020 and December 31, 2019, respectively) 2,909,081 2,922,408
Lease liabilities - finance leases (amounts related to VIEs of $20,306 and $20,189 at December 31, 2020 and December 31, 2019, respectively) 236,492 224,042
Accounts payable and accrued expenses (amounts related to VIEs of $23,128 and $45,777 at December 31, 2020 and December 31, 2019, respectively) 336,264 377,553
Other liabilities (amounts related to VIEs of $158,805 and $140,110 at December 31, 2020 and December 31, 2019, respectively) $ 412,084 $ 387,994
Reddemable deferred stock units, units 72,966 60,676
Limited Partners' Capital Account, Units Outstanding (in units) 153,987,904  
General Partners' Capital Account, Units Outstanding (in units) 1,730,921  
Excess stock, par value $ 0.01 $ 0.01
Excess stock, shares authorized 150,000,000 150,000,000
Excess stock, shares outstanding 0 0
Excess stock, shares issued 0 0
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 50,000,000 50,000,000
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common stock, shares authorized 250,000,000 250,000,000
Common stock, shares issued 155,797,725 154,869,198
Common Stock, Shares, Outstanding 155,718,825 154,790,298
Treasury common stock at cost, shares 78,900 78,900
Boston Properties Limited Partnership    
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,592,019 and $6,497,031 at December 31, 2020 and December 31, 2019, respectively) $ 22,592,301 $ 22,107,755
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2020 and December 31, 2019, respectively) 237,393 237,394
Less: accumulated depreciation (amounts related to VIEs of $(1,158,548) and $(1,058,495) at December 31, 2020 and December 31, 2019, respectively) (5,428,576) (5,162,908)
Cash and cash equivalents (amounts related to VIEs of $340,642 and $280,033 at December 31, 2020 and December 31, 2019, respectively) 1,668,742 644,950
Tenant and other receivables, net (amounts related to VIEs of $10,911 and $28,918 at December 31, 2020 and December 31, 2019, respectively) 77,411 112,807
Accrued rental income, net (amounts related to VIEs of $336,594 and $298,318 at December 31, 2020 and December 31, 2019, respectively) 1,122,502 1,038,788
Deferred charges, net (amounts related to VIEs of $183,306 and $214,769 at December 31, 2020 and December 31, 2019, respectively) 640,085 689,213
Prepaid expenses and other assets (amounts related to VIEs of $13,137 and $20,931 at December 31, 2020 and December 31, 2019, respectively) 33,840 41,685
Mortgage notes payable, net (amounts related to VIEs of $2,907,590 and $2,918,806 at December 31, 2020 and December 31, 2019, respectively) 2,909,081 2,922,408
Lease liabilities - finance leases (amounts related to VIEs of $20,306 and $20,189 at December 31, 2020 and December 31, 2019, respectively) 236,492 224,042
Accounts payable and accrued expenses (amounts related to VIEs of $23,128 and $45,777 at December 31, 2020 and December 31, 2019, respectively) 336,264 377,553
Other liabilities (amounts related to VIEs of $158,805 and $140,110 at December 31, 2020 and December 31, 2019, respectively) $ 412,084 $ 387,994
Reddemable deferred stock units, units 72,966 60,676
NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding 16,037,121 16,764,466
NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding 1,336,115 1,143,215
Limited Partners' Capital Account, Units Outstanding (in units) 153,987,904 153,063,318
General Partners' Capital Account, Units Outstanding (in units) 1,730,921 1,726,980
Series B Cumulative Redeemable Preferred Stock / Unit [Member]    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 92,000 92,000
Preferred stock / units, shares / units issued (in shares / units) 80,000 80,000
Preferred stock / units, shares / units outstanding (in shares / units) 80,000 80,000
Series B Dividend Rate Percentage 5.25% 5.25%
Series B Liquidation Preference Per Share/ Unit $ 2,500.00 $ 2,500
Series B Cumulative Redeemable Preferred Stock / Unit [Member] | Boston Properties Limited Partnership    
Preferred stock / units, shares / units issued (in shares / units) 80,000 80,000
Preferred stock / units, shares / units outstanding (in shares / units) 80,000 80,000
Series B Dividend Rate Percentage 5.25% 5.25%
Series B Liquidation Preference Per Share/ Unit $ 2,500 $ 2,500
Variable Interest Entity, Primary Beneficiary [Member]    
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,592,019 and $6,497,031 at December 31, 2020 and December 31, 2019, respectively) $ 6,592,019 $ 6,497,031
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2020 and December 31, 2019, respectively) 21,000 21,000
Less: accumulated depreciation (amounts related to VIEs of $(1,158,548) and $(1,058,495) at December 31, 2020 and December 31, 2019, respectively) (1,158,548) (1,058,495)
Cash and cash equivalents (amounts related to VIEs of $340,642 and $280,033 at December 31, 2020 and December 31, 2019, respectively) 340,642 280,033
Tenant and other receivables, net (amounts related to VIEs of $10,911 and $28,918 at December 31, 2020 and December 31, 2019, respectively) 10,911 28,918
Accrued rental income, net (amounts related to VIEs of $336,594 and $298,318 at December 31, 2020 and December 31, 2019, respectively) 336,594 298,318
Deferred charges, net (amounts related to VIEs of $183,306 and $214,769 at December 31, 2020 and December 31, 2019, respectively) 183,306 214,769
Prepaid expenses and other assets (amounts related to VIEs of $13,137 and $20,931 at December 31, 2020 and December 31, 2019, respectively) 13,137 20,931
Mortgage notes payable, net (amounts related to VIEs of $2,907,590 and $2,918,806 at December 31, 2020 and December 31, 2019, respectively) 2,907,590 2,918,806
Lease liabilities - finance leases (amounts related to VIEs of $20,306 and $20,189 at December 31, 2020 and December 31, 2019, respectively) 20,306 20,189
Accounts payable and accrued expenses (amounts related to VIEs of $23,128 and $45,777 at December 31, 2020 and December 31, 2019, respectively) 23,128 45,777
Other liabilities (amounts related to VIEs of $158,805 and $140,110 at December 31, 2020 and December 31, 2019, respectively) 158,805 140,110
Variable Interest Entity, Primary Beneficiary [Member] | Boston Properties Limited Partnership    
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,592,019 and $6,497,031 at December 31, 2020 and December 31, 2019, respectively) 6,592,019 6,497,031
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2020 and December 31, 2019, respectively) 21,000 21,000
Less: accumulated depreciation (amounts related to VIEs of $(1,158,548) and $(1,058,495) at December 31, 2020 and December 31, 2019, respectively) (1,158,548) (1,058,495)
Cash and cash equivalents (amounts related to VIEs of $340,642 and $280,033 at December 31, 2020 and December 31, 2019, respectively) 340,642 280,033
Tenant and other receivables, net (amounts related to VIEs of $10,911 and $28,918 at December 31, 2020 and December 31, 2019, respectively) 10,911 28,918
Accrued rental income, net (amounts related to VIEs of $336,594 and $298,318 at December 31, 2020 and December 31, 2019, respectively) 336,594 298,318
Deferred charges, net (amounts related to VIEs of $183,306 and $214,769 at December 31, 2020 and December 31, 2019, respectively) 183,306 214,769
Prepaid expenses and other assets (amounts related to VIEs of $13,137 and $20,931 at December 31, 2020 and December 31, 2019, respectively) 13,137 20,931
Mortgage notes payable, net (amounts related to VIEs of $2,907,590 and $2,918,806 at December 31, 2020 and December 31, 2019, respectively) 2,907,590 2,918,806
Lease liabilities - finance leases (amounts related to VIEs of $20,306 and $20,189 at December 31, 2020 and December 31, 2019, respectively) 20,306 20,189
Accounts payable and accrued expenses (amounts related to VIEs of $23,128 and $45,777 at December 31, 2020 and December 31, 2019, respectively) 23,128 45,777
Other liabilities (amounts related to VIEs of $158,805 and $140,110 at December 31, 2020 and December 31, 2019, respectively) $ 158,805 $ 140,110