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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,702,830 and $6,592,019 at December 31, 2021 and December 31, 2020, respectively) | $ 23,752,630 | $ 22,969,110
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2021 and December 31, 2020, respectively) | 237,507 | 237,393
Less: accumulated depreciation (amounts related to VIEs of $(1,283,060) and $(1,158,548) at December 31, 2021 and December 31, 2020, respectively) | (5,883,961) | (5,534,102)
Cash and cash equivalents (amounts related to VIEs of $300,937 and $340,642 at December 31, 2021 and December 31, 2020, respectively) | 452,692 | 1,668,742
Tenant and other receivables, net (amounts related to VIEs of $6,824 and $10,911 at December 31, 2021 and December 31, 2020, respectively) | 70,186 | 77,411
Accrued rental income, net (amounts related to VIEs of $357,395 and $336,594 at December 31, 2021 and December 31, 2020, respectively) | 1,226,745 | 1,122,502
Deferred charges, net (amounts related to VIEs of $174,637 and $183,306 at December 31, 2021 and December 31, 2020, respectively) | 618,798 | 640,085
Prepaid expenses and other assets (amounts related to VIEs of $29,668 and $13,137 at December 31, 2021 and December 31, 2020, respectively) | 57,811 | 33,840
Secured Debt | 3,267,914 | 2,909,081
Lease liabilities - finance leases (amounts related to VIEs of $20,458 and $20,306 at December 31, 2021 and December 31, 2020, respectively) | 244,421 | 236,492
Accounts payable and accrued expenses (amounts related to VIEs of $29,464 and $23,128 at December 31, 2021 and December 31, 2020, respectively) | 320,775 | 336,264
Other liabilities (amounts related to VIEs of $150,131 and $158,805 at December 31, 2021 and December 31, 2020, respectively) | $ 391,441 | $ 412,084
Reedemable deferred stock units, units | 83,073 | 72,966
Limited Partners' Capital Account, Units Outstanding (in units) | 154,798,935 |
General Partners' Capital Account, Units Outstanding (in units) | 1,745,914 |
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 | 156,623,749 | 155,797,725
Common Stock, Shares, Outstanding | 156,544,849 | 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 $6,702,830 and $6,592,019 at December 31, 2021 and December 31, 2020, respectively) | $ 23,379,243 | $ 22,592,301
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2021 and December 31, 2020, respectively) | 237,507 | 237,393
Less: accumulated depreciation (amounts related to VIEs of $(1,283,060) and $(1,158,548) at December 31, 2021 and December 31, 2020, respectively) | (5,772,018) | (5,428,576)
Cash and cash equivalents (amounts related to VIEs of $300,937 and $340,642 at December 31, 2021 and December 31, 2020, respectively) | 452,692 | 1,668,742
Tenant and other receivables, net (amounts related to VIEs of $6,824 and $10,911 at December 31, 2021 and December 31, 2020, respectively) | 70,186 | 77,411
Accrued rental income, net (amounts related to VIEs of $357,395 and $336,594 at December 31, 2021 and December 31, 2020, respectively) | 1,226,745 | 1,122,502
Deferred charges, net (amounts related to VIEs of $174,637 and $183,306 at December 31, 2021 and December 31, 2020, respectively) | 618,798 | 640,085
Prepaid expenses and other assets (amounts related to VIEs of $29,668 and $13,137 at December 31, 2021 and December 31, 2020, respectively) | 57,811 | 33,840
Secured Debt | 3,267,914 | 2,909,081
Lease liabilities - finance leases (amounts related to VIEs of $20,458 and $20,306 at December 31, 2021 and December 31, 2020, respectively) | 244,421 | 236,492
Accounts payable and accrued expenses (amounts related to VIEs of $29,464 and $23,128 at December 31, 2021 and December 31, 2020, respectively) | 320,775 | 336,264
Other liabilities (amounts related to VIEs of $150,131 and $158,805 at December 31, 2021 and December 31, 2020, respectively) | $ 391,441 | $ 412,084
Reedemable deferred stock units, units | 83,073 | 72,966
Limited Partners' Capital Account, Units Outstanding (in units) | 154,798,935 | 153,987,904
General Partners' Capital Account, Units Outstanding (in units) | 1,745,914 | 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 $6,702,830 and $6,592,019 at December 31, 2021 and December 31, 2020, respectively) | $ 6,702,830 | $ 6,592,019
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2021 and December 31, 2020, respectively) | 21,000 | 21,000
Less: accumulated depreciation (amounts related to VIEs of $(1,283,060) and $(1,158,548) at December 31, 2021 and December 31, 2020, respectively) | (1,283,060) | (1,158,548)
Cash and cash equivalents (amounts related to VIEs of $300,937 and $340,642 at December 31, 2021 and December 31, 2020, respectively) | 300,937 | 340,642
Tenant and other receivables, net (amounts related to VIEs of $6,824 and $10,911 at December 31, 2021 and December 31, 2020, respectively) | 6,824 | 10,911
Accrued rental income, net (amounts related to VIEs of $357,395 and $336,594 at December 31, 2021 and December 31, 2020, respectively) | 357,395 | 336,594
Deferred charges, net (amounts related to VIEs of $174,637 and $183,306 at December 31, 2021 and December 31, 2020, respectively) | 174,637 | 183,306
Prepaid expenses and other assets (amounts related to VIEs of $29,668 and $13,137 at December 31, 2021 and December 31, 2020, respectively) | 29,668 | 13,137
Secured Debt | 3,267,914 | 2,907,590
Lease liabilities - finance leases (amounts related to VIEs of $20,458 and $20,306 at December 31, 2021 and December 31, 2020, respectively) | 20,458 | 20,306
Accounts payable and accrued expenses (amounts related to VIEs of $29,464 and $23,128 at December 31, 2021 and December 31, 2020, respectively) | 29,464 | 23,128
Other liabilities (amounts related to VIEs of $150,131 and $158,805 at December 31, 2021 and December 31, 2020, respectively) | 150,131 | 158,805
Variable Interest Entity, Primary Beneficiary [Member] | Boston Properties Limited Partnership |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,702,830 and $6,592,019 at December 31, 2021 and December 31, 2020, respectively) | 6,702,830 | 6,592,019
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2021 and December 31, 2020, respectively) | 21,000 | 21,000
Less: accumulated depreciation (amounts related to VIEs of $(1,283,060) and $(1,158,548) at December 31, 2021 and December 31, 2020, respectively) | (1,283,060) | (1,158,548)
Cash and cash equivalents (amounts related to VIEs of $300,937 and $340,642 at December 31, 2021 and December 31, 2020, respectively) | 300,937 | 340,642
Tenant and other receivables, net (amounts related to VIEs of $6,824 and $10,911 at December 31, 2021 and December 31, 2020, respectively) | 6,824 | 10,911
Accrued rental income, net (amounts related to VIEs of $357,395 and $336,594 at December 31, 2021 and December 31, 2020, respectively) | 357,395 | 336,594
Deferred charges, net (amounts related to VIEs of $174,637 and $183,306 at December 31, 2021 and December 31, 2020, respectively) | 174,637 | 183,306
Prepaid expenses and other assets (amounts related to VIEs of $29,668 and $13,137 at December 31, 2021 and December 31, 2020, respectively) | 29,668 | 13,137
Secured Debt | 3,267,914 | 2,907,590
Lease liabilities - finance leases (amounts related to VIEs of $20,458 and $20,306 at December 31, 2021 and December 31, 2020, respectively) | 20,458 | 20,306
Accounts payable and accrued expenses (amounts related to VIEs of $29,464 and $23,128 at December 31, 2021 and December 31, 2020, respectively) | 29,464 | 23,128
Other liabilities (amounts related to VIEs of $150,131 and $158,805 at December 31, 2021 and December 31, 2020, respectively) | $ 150,131 | $ 158,805

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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cumulative amount of depreciation for real estate property held for investment purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(3)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of a new issue of securities classified as temporary equity that are allocated to investors for them to buy. When securities are sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the securities to the investor until it receives the entire proceeds. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(27)(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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