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Consolidated Balance Sheets - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
ASSETS |  |
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
Right of use assets - operating leases | 146,406 | 148,640
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)
Total real estate | 17,818,807 | 17,622,212
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
Cash held in escrows | 50,587 | 46,936
Investments in securities | 39,457 | 36,747
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
Related party note receivable, net | 77,552 | 80,000
Notes receivable, net | 18,729 | 15,920
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
Investments in unconsolidated joint ventures | 1,310,478 | 955,647
Total assets | 22,858,190 | 21,284,905
Liabilities: |  |
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
Unsecured senior notes, net | 9,639,287 | 8,390,459
Unsecured line of credit | 0 | 0
Unsecured term loan, net | 499,390 | 498,939
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
Lease liabilities - operating leases | 201,713 | 200,180
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
Dividends and distributions payable | 171,082 | 170,713
Accrued interest payable | 106,288 | 90,016
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
Total liabilities | 14,511,681 | 13,262,304
Redeemable deferred stock units— 72,966 and 60,676 units outstanding at redemption value at December 31, 2020 and December 31, 2019, respectively | 6,897 | 8,365
Equity / Capital: |  |
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding | 0 | 0
Preferred stock, $0.01 par value, 50,000,000 shares authorized; |  |
5.25% Series B cumulative redeemable preferred stock / units, liquidation preference $2,500 per share / unit, 80,000 shares / units issued and outstanding at December 31, 2020 and December 31, 2019, respectively | 200,000 | 200,000
Common stock, $0.01 par value, 250,000,000 shares authorized, 155,797,725 and 154,869,198 issued and 155,718,825 and 154,790,298 outstanding at December 31, 2020 and December 31, 2019, respectively | 1,557 | 1,548
Additional paid-in capital | 6,356,791 | 6,294,719
Dividends in excess of earnings | (509,653) | (760,523)
Treasury common stock at cost, 78,900 shares at December 31, 2020 and December 31, 2019 | (2,722) | (2,722)
Accumulated other comprehensive loss | (49,890) | (48,335)
Total stockholders' equity attributable to Boston Properties, Inc. | 5,996,083 | 5,684,687
Noncontrolling interests: |  |
Common units of the Operating Partnership | 616,596 | 600,860
Property partnerships | 1,726,933 | 1,728,689
Total equity / capital | 8,339,612 | 8,014,236
Total liabilities and equity / capital | 22,858,190 | 21,284,905
Boston Properties Limited Partnership |  |
ASSETS |  |
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
Right of use assets - operating leases | 146,406 | 148,640
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)
Total real estate | 17,547,524 | 17,330,881
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
Cash held in escrows | 50,587 | 46,936
Investments in securities | 39,457 | 36,747
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
Related party note receivable, net | 77,552 | 80,000
Notes receivable, net | 18,729 | 15,920
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
Investments in unconsolidated joint ventures | 1,310,478 | 955,647
Total assets | 22,586,907 | 20,993,574
Liabilities: |  |
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
Unsecured senior notes, net | 9,639,287 | 8,390,459
Unsecured line of credit | 0 | 0
Unsecured term loan, net | 499,390 | 498,939
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
Lease liabilities - operating leases | 201,713 | 200,180
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
Dividends and distributions payable | 171,082 | 170,713
Accrued interest payable | 106,288 | 90,016
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
Total liabilities | 14,511,681 | 13,262,304
Redeemable deferred stock units— 72,966 and 60,676 units outstanding at redemption value at December 31, 2020 and December 31, 2019, respectively | 6,897 | 8,365
Redeemable partnership units— 16,037,121 and 16,764,466 common units and 1,336,115 and 1,143,215 long term incentive units outstanding at redemption value at December 31, 2020 and December 31, 2019, respectively | 1,643,024 | 2,468,753
Preferred stock, $0.01 par value, 50,000,000 shares authorized; |  |
5.25% Series B cumulative redeemable preferred stock / units, liquidation preference $2,500 per share / unit, 80,000 shares / units issued and outstanding at December 31, 2020 and December 31, 2019, respectively | 193,623 | 193,623
Boston Properties Limited Partnership partners’ capital— 1,730,921 and 1,726,980 general partner units and 153,987,904 and 153,063,318 limited partner units outstanding at December 31, 2020 and December 31, 2019, respectively | 4,554,639 | 3,380,175
Accumulated other comprehensive loss | (49,890) | (48,335)
Total partners’ capital | 4,698,372 | 3,525,463
Noncontrolling interests in property partnerships | 1,726,933 | 1,728,689
Noncontrolling interests: |  |
Total equity / capital | 6,425,305 | 5,254,152
Total liabilities and equity / capital | $ 22,586,907 | $ 20,993,574

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