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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,688,647 and $6,592,019 at September 30, 2021 and December 31, 2020, respectively) | $ 23,711,400 | $ 22,969,110
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2021 and December 31, 2020, respectively) | 237,845 | 237,393
Less: accumulated depreciation (amounts related to VIEs of $(1,266,516) and $(1,158,548) at September 30, 2021 and December 31, 2020, respectively) | (5,850,397) | (5,534,102)
Cash and cash equivalents (amounts related to VIEs of $288,186 and $340,642 at September 30, 2021 and December 31, 2020, respectively) | 1,002,728 | 1,668,742
Tenant and other receivables, net (amounts related to VIEs of $8,598 and $10,911 at September 30, 2021 and December 31, 2020, respectively) | 61,269 | 77,411
Accrued rental income, net (amounts related to VIEs of $352,291 and $336,594 at September 30, 2021 and December 31, 2020, respectively) | 1,203,840 | 1,122,502
Deferred charges, net (amounts related to VIEs of $174,172 and $183,306 at September 30, 2021 and December 31, 2020, respectively) | 622,807 | 640,085
Prepaid expenses and other assets (amounts related to VIEs of $42,051 and $13,137 at September 30, 2021 and December 31, 2020, respectively) | 97,560 | 33,840
Mortgage notes payable, net (amounts related to VIEs of $2,898,699 and $2,907,590 at September 30, 2021 and December 31, 2020, respectively) | 2,898,699 | 2,909,081
Lease liabilities - finance leases (amounts related to VIEs of $20,420 and $20,306 at September 30, 2021 and December 31, 2020, respectively) | 243,562 | 236,492
Accounts payable and accrued expenses (amounts related to VIEs of $36,967 and $23,128 at September 30, 2021 and December 31, 2020, respectively) | 331,687 | 336,264
Other liabilities (amounts related to VIEs of $124,615 and $158,805 at September 30, 2021 and December 31, 2020, respectively) | $ 370,403 | $ 412,084
Reddemable deferred stock units, units | 80,989 | 72,966
Limited Partners' Capital Account, Units Outstanding (in units) | 154,469,658 |
General Partners' Capital Account, Units Outstanding (in units) | 1,736,833 |
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 | 156,285,391 | 155,797,725
Common Stock, Shares, Outstanding | 156,206,491 | 155,718,825
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 $6,688,647 and $6,592,019 at September 30, 2021 and December 31, 2020, respectively) | $ 23,335,905 | $ 22,592,301
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2021 and December 31, 2020, respectively) | 237,845 | 237,393
Less: accumulated depreciation (amounts related to VIEs of $(1,266,516) and $(1,158,548) at September 30, 2021 and December 31, 2020, respectively) | (5,739,625) | (5,428,576)
Cash and cash equivalents (amounts related to VIEs of $288,186 and $340,642 at September 30, 2021 and December 31, 2020, respectively) | 1,002,728 | 1,668,742
Tenant and other receivables, net (amounts related to VIEs of $8,598 and $10,911 at September 30, 2021 and December 31, 2020, respectively) | 61,269 | 77,411
Accrued rental income, net (amounts related to VIEs of $352,291 and $336,594 at September 30, 2021 and December 31, 2020, respectively) | 1,203,840 | 1,122,502
Deferred charges, net (amounts related to VIEs of $174,172 and $183,306 at September 30, 2021 and December 31, 2020, respectively) | 622,807 | 640,085
Prepaid expenses and other assets (amounts related to VIEs of $42,051 and $13,137 at September 30, 2021 and December 31, 2020, respectively) | 97,560 | 33,840
Mortgage notes payable, net (amounts related to VIEs of $2,898,699 and $2,907,590 at September 30, 2021 and December 31, 2020, respectively) | 2,898,699 | 2,909,081
Lease liabilities - finance leases (amounts related to VIEs of $20,420 and $20,306 at September 30, 2021 and December 31, 2020, respectively) | 243,562 | 236,492
Accounts payable and accrued expenses (amounts related to VIEs of $36,967 and $23,128 at September 30, 2021 and December 31, 2020, respectively) | 331,687 | 336,264
Other liabilities (amounts related to VIEs of $124,615 and $158,805 at September 30, 2021 and December 31, 2020, respectively) | $ 370,403 | $ 412,084
Reddemable deferred stock units, units | 80,989 | 72,966
NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding | 15,989,304 | 16,037,121
NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding | 1,487,492 | 1,336,115
Limited Partners' Capital Account, Units Outstanding (in units) | 154,469,658 | 153,987,904
General Partners' Capital Account, Units Outstanding (in units) | 1,736,833 | 1,730,921
Series B Cumulative Redeemable Preferred Stock / Unit [Member] |  |
Preferred stock, par value |  | $ 0.01
Preferred stock, shares authorized |  | 92,000
Preferred stock / units, shares / units issued (in shares / units) |  | 80,000
Preferred stock / units, shares / units outstanding (in shares / units) |  | 80,000
Series B Dividend Rate Percentage |  | 5.25%
Series B Liquidation Preference Per Share/ Unit |  | $ 2,500
Variable Interest Entity, Primary Beneficiary [Member] |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,688,647 and $6,592,019 at September 30, 2021 and December 31, 2020, respectively) | $ 6,688,647 | $ 6,592,019
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2021 and December 31, 2020, respectively) | 21,000 | 21,000
Less: accumulated depreciation (amounts related to VIEs of $(1,266,516) and $(1,158,548) at September 30, 2021 and December 31, 2020, respectively) | (1,266,516) | (1,158,548)
Cash and cash equivalents (amounts related to VIEs of $288,186 and $340,642 at September 30, 2021 and December 31, 2020, respectively) | 288,186 | 340,642
Tenant and other receivables, net (amounts related to VIEs of $8,598 and $10,911 at September 30, 2021 and December 31, 2020, respectively) | 8,598 | 10,911
Accrued rental income, net (amounts related to VIEs of $352,291 and $336,594 at September 30, 2021 and December 31, 2020, respectively) | 352,291 | 336,594
Deferred charges, net (amounts related to VIEs of $174,172 and $183,306 at September 30, 2021 and December 31, 2020, respectively) | 174,172 | 183,306
Prepaid expenses and other assets (amounts related to VIEs of $42,051 and $13,137 at September 30, 2021 and December 31, 2020, respectively) | 42,051 | 13,137
Mortgage notes payable, net (amounts related to VIEs of $2,898,699 and $2,907,590 at September 30, 2021 and December 31, 2020, respectively) | 2,898,699 | 2,907,590
Lease liabilities - finance leases (amounts related to VIEs of $20,420 and $20,306 at September 30, 2021 and December 31, 2020, respectively) | 20,420 | 20,306
Accounts payable and accrued expenses (amounts related to VIEs of $36,967 and $23,128 at September 30, 2021 and December 31, 2020, respectively) | 36,967 | 23,128
Other liabilities (amounts related to VIEs of $124,615 and $158,805 at September 30, 2021 and December 31, 2020, respectively) | 124,615 | 158,805
Variable Interest Entity, Primary Beneficiary [Member] | Boston Properties Limited Partnership |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,688,647 and $6,592,019 at September 30, 2021 and December 31, 2020, respectively) | 6,688,647 | 6,592,019
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at September 30, 2021 and December 31, 2020, respectively) | 21,000 | 21,000
Less: accumulated depreciation (amounts related to VIEs of $(1,266,516) and $(1,158,548) at September 30, 2021 and December 31, 2020, respectively) | (1,266,516) | (1,158,548)
Cash and cash equivalents (amounts related to VIEs of $288,186 and $340,642 at September 30, 2021 and December 31, 2020, respectively) | 288,186 | 340,642
Tenant and other receivables, net (amounts related to VIEs of $8,598 and $10,911 at September 30, 2021 and December 31, 2020, respectively) | 8,598 | 10,911
Accrued rental income, net (amounts related to VIEs of $352,291 and $336,594 at September 30, 2021 and December 31, 2020, respectively) | 352,291 | 336,594
Deferred charges, net (amounts related to VIEs of $174,172 and $183,306 at September 30, 2021 and December 31, 2020, respectively) | 174,172 | 183,306
Prepaid expenses and other assets (amounts related to VIEs of $42,051 and $13,137 at September 30, 2021 and December 31, 2020, respectively) | 42,051 | 13,137
Mortgage notes payable, net (amounts related to VIEs of $2,898,699 and $2,907,590 at September 30, 2021 and December 31, 2020, respectively) | 2,898,699 | 2,907,590
Lease liabilities - finance leases (amounts related to VIEs of $20,420 and $20,306 at September 30, 2021 and December 31, 2020, respectively) | 20,420 | 20,306
Accounts payable and accrued expenses (amounts related to VIEs of $36,967 and $23,128 at September 30, 2021 and December 31, 2020, respectively) | 36,967 | 23,128
Other liabilities (amounts related to VIEs of $124,615 and $158,805 at September 30, 2021 and December 31, 2020, respectively) | $ 124,615 | $ 158,805
Boston Properties Limited Partnership | Series B Cumulative Redeemable Preferred Stock / Unit [Member] |  |
Preferred stock / units, shares / units issued (in shares / units) |  | 80,000
Preferred stock / units, shares / units outstanding (in shares / units) |  | 80,000
Series B Dividend Rate Percentage |  | 5.25%
Series B Liquidation Preference Per Share/ Unit |  | $ 2,500

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