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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,646,435 and $7,054,075 at September 30, 2024 and December 31, 2023, respectively) $ 27,557,824 $ 26,749,209
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2024 and December 31, 2023, respectively) 372,896 401,680
Right of use assets - operating leases (amounts related to VIEs of $145,052 and $158,885 at September 30, 2024 and December 31, 2023, respectively) [1] 339,804 324,298
Less: accumulated depreciation (amounts related to VIEs of $(1,601,919) and $(1,501,483) at September 30, 2024 and December 31, 2023, respectively) (7,369,545) (6,881,728)
Cash and cash equivalents (amounts related to VIEs of $322,604 and $245,317 at September 30, 2024 and December 31, 2023, respectively) 1,420,475 1,531,477
Cash held in escrows (amounts related to VIEs of $5,032 and $22,160 at September 30, 2024 and December 31, 2023, respectively) 51,009 81,090
Tenant and other receivables, net (amounts related to VIEs of $19,216 and $27,987 at September 30, 2024 and December 31, 2023, respectively) 99,706 122,407
Accrued rental income, net (amounts related to VIEs of $425,867 and $401,159 at September 30, 2024 and December 31, 2023, respectively) 1,438,492 1,355,212
Deferred charges, net (amounts related to VIEs of $201,947 and $175,383 at September 30, 2024 and December 31, 2023, respectively) 794,571 760,421
Prepaid expenses and other assets (amounts related to VIEs of $50,275 and $11,824 at September 30, 2024 and December 31, 2023, respectively) 132,078 64,230
Mortgage notes payable, net (amounts related to VIEs of $3,280,817 and $3,277,185 at September 30, 2024 and December 31, 2023, respectively) 4,275,155 4,166,379
Lease liabilities - finance leases (amounts related to VIEs of $20,897 and $20,794 at September 30, 2024 and December 31, 2023, respectively) 373,260 417,961
Lease liabilities - operating leases (amounts related to VIEs of $154,637 and $145,826 at September 30, 2024 and December 31, 2023, respectively) 389,444 350,391
Accounts payable and accrued expenses (amounts related to VIEs of $120,092 and $59,667 at September 30, 2024 and December 31, 2023, respectively) 444,288 458,329
Other liabilities (amounts related to VIEs of $89,876 and $115,275 at September 30, 2024 and December 31, 2023, respectively) $ 407,441 $ 445,947
Reedemable deferred stock units, units 132,930 119,471
Limited Partners' Capital Account, Units Outstanding (in units) 156,217,471  
General Partners' Capital Account, Units Outstanding (in units) 1,762,427  
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
Preferred stock / units, shares / units issued (in shares / units) 0 0
Preferred stock / units, shares / units outstanding (in shares / units) 0 0
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 158,058,798 157,019,766
Common Stock, Shares, Outstanding 157,979,898 156,940,866
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 $7,646,435 and $7,054,075 at September 30, 2024 and December 31, 2023, respectively) $ 27,191,559 $ 26,382,944
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2024 and December 31, 2023, respectively) 372,896 401,680
Right of use assets - operating leases (amounts related to VIEs of $145,052 and $158,885 at September 30, 2024 and December 31, 2023, respectively) [1] 339,804 324,298
Less: accumulated depreciation (amounts related to VIEs of $(1,601,919) and $(1,501,483) at September 30, 2024 and December 31, 2023, respectively) (7,241,074) (6,758,361)
Cash and cash equivalents (amounts related to VIEs of $322,604 and $245,317 at September 30, 2024 and December 31, 2023, respectively) 1,420,475 1,531,477
Cash held in escrows (amounts related to VIEs of $5,032 and $22,160 at September 30, 2024 and December 31, 2023, respectively) 51,009 81,090
Tenant and other receivables, net (amounts related to VIEs of $19,216 and $27,987 at September 30, 2024 and December 31, 2023, respectively) 99,706 122,407
Accrued rental income, net (amounts related to VIEs of $425,867 and $401,159 at September 30, 2024 and December 31, 2023, respectively) 1,438,492 1,355,212
Deferred charges, net (amounts related to VIEs of $201,947 and $175,383 at September 30, 2024 and December 31, 2023, respectively) 794,571 760,421
Prepaid expenses and other assets (amounts related to VIEs of $50,275 and $11,824 at September 30, 2024 and December 31, 2023, respectively) 132,078 64,230
Mortgage notes payable, net (amounts related to VIEs of $3,280,817 and $3,277,185 at September 30, 2024 and December 31, 2023, respectively) 4,275,155 4,166,379
Lease liabilities - finance leases (amounts related to VIEs of $20,897 and $20,794 at September 30, 2024 and December 31, 2023, respectively) 373,260 417,961
Lease liabilities - operating leases (amounts related to VIEs of $154,637 and $145,826 at September 30, 2024 and December 31, 2023, respectively) 389,444 350,391
Accounts payable and accrued expenses (amounts related to VIEs of $120,092 and $59,667 at September 30, 2024 and December 31, 2023, respectively) 444,288 458,329
Other liabilities (amounts related to VIEs of $89,876 and $115,275 at September 30, 2024 and December 31, 2023, respectively) $ 407,441 $ 445,947
Reedemable deferred stock units, units 132,930 119,471
Limited Partners' Capital Account, Units Outstanding (in units) 156,217,471 155,185,716
General Partners' Capital Account, Units Outstanding (in units) 1,762,427 1,755,150
NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding 15,926,014 16,508,277
NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding 2,336,797 2,065,861
Variable Interest Entity, Primary Beneficiary [Member]    
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,646,435 and $7,054,075 at September 30, 2024 and December 31, 2023, respectively) $ 7,646,435 $ 7,054,075
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2024 and December 31, 2023, respectively) 21,000 21,000
Right of use assets - operating leases (amounts related to VIEs of $145,052 and $158,885 at September 30, 2024 and December 31, 2023, respectively) 145,052 158,885
Less: accumulated depreciation (amounts related to VIEs of $(1,601,919) and $(1,501,483) at September 30, 2024 and December 31, 2023, respectively) (1,601,919) (1,501,483)
Cash and cash equivalents (amounts related to VIEs of $322,604 and $245,317 at September 30, 2024 and December 31, 2023, respectively) 322,604 245,317
Cash held in escrows (amounts related to VIEs of $5,032 and $22,160 at September 30, 2024 and December 31, 2023, respectively) 5,032 22,160
Tenant and other receivables, net (amounts related to VIEs of $19,216 and $27,987 at September 30, 2024 and December 31, 2023, respectively) 19,216 27,987
Accrued rental income, net (amounts related to VIEs of $425,867 and $401,159 at September 30, 2024 and December 31, 2023, respectively) 425,867 401,159
Deferred charges, net (amounts related to VIEs of $201,947 and $175,383 at September 30, 2024 and December 31, 2023, respectively) 201,947 175,383
Prepaid expenses and other assets (amounts related to VIEs of $50,275 and $11,824 at September 30, 2024 and December 31, 2023, respectively) 50,275 11,824
Mortgage notes payable, net (amounts related to VIEs of $3,280,817 and $3,277,185 at September 30, 2024 and December 31, 2023, respectively) 3,280,817 3,277,185
Lease liabilities - finance leases (amounts related to VIEs of $20,897 and $20,794 at September 30, 2024 and December 31, 2023, respectively) 20,897 20,794
Lease liabilities - operating leases (amounts related to VIEs of $154,637 and $145,826 at September 30, 2024 and December 31, 2023, respectively) 154,637 145,826
Accounts payable and accrued expenses (amounts related to VIEs of $120,092 and $59,667 at September 30, 2024 and December 31, 2023, respectively) 120,092 59,667
Other liabilities (amounts related to VIEs of $89,876 and $115,275 at September 30, 2024 and December 31, 2023, respectively) 89,876 115,275
Variable Interest Entity, Primary Beneficiary [Member] | Boston Properties Limited Partnership    
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,646,435 and $7,054,075 at September 30, 2024 and December 31, 2023, respectively) 7,646,435 7,054,075
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2024 and December 31, 2023, respectively) 21,000 21,000
Right of use assets - operating leases (amounts related to VIEs of $145,052 and $158,885 at September 30, 2024 and December 31, 2023, respectively) 145,052 158,885
Less: accumulated depreciation (amounts related to VIEs of $(1,601,919) and $(1,501,483) at September 30, 2024 and December 31, 2023, respectively) (1,601,919) (1,501,483)
Cash and cash equivalents (amounts related to VIEs of $322,604 and $245,317 at September 30, 2024 and December 31, 2023, respectively) 322,604 245,317
Cash held in escrows (amounts related to VIEs of $5,032 and $22,160 at September 30, 2024 and December 31, 2023, respectively) 5,032 22,160
Tenant and other receivables, net (amounts related to VIEs of $19,216 and $27,987 at September 30, 2024 and December 31, 2023, respectively) 19,216 27,987
Accrued rental income, net (amounts related to VIEs of $425,867 and $401,159 at September 30, 2024 and December 31, 2023, respectively) 425,867 401,159
Deferred charges, net (amounts related to VIEs of $201,947 and $175,383 at September 30, 2024 and December 31, 2023, respectively) 201,947 175,383
Prepaid expenses and other assets (amounts related to VIEs of $50,275 and $11,824 at September 30, 2024 and December 31, 2023, respectively) 50,275 11,824
Mortgage notes payable, net (amounts related to VIEs of $3,280,817 and $3,277,185 at September 30, 2024 and December 31, 2023, respectively) 3,280,817 3,277,185
Lease liabilities - finance leases (amounts related to VIEs of $20,897 and $20,794 at September 30, 2024 and December 31, 2023, respectively) 20,897 20,794
Lease liabilities - operating leases (amounts related to VIEs of $154,637 and $145,826 at September 30, 2024 and December 31, 2023, respectively) 154,637 145,826
Accounts payable and accrued expenses (amounts related to VIEs of $120,092 and $59,667 at September 30, 2024 and December 31, 2023, respectively) 120,092 59,667
Other liabilities (amounts related to VIEs of $89,876 and $115,275 at September 30, 2024 and December 31, 2023, respectively) $ 89,876 $ 115,275
[1] See Note 4.