Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,870,107 and $6,789,029 at June 30, 2023 and December 31, 2022, respectively)	$ 25,762,722	$ 25,389,663
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at June 30, 2023 and December 31, 2022, respectively)	237,526	237,510
Right of use assets - operating leases	166,421	167,351
Less: accumulated depreciation (amounts related to VIEs of $(1,434,592) and $(1,381,401) at June 30, 2023 and December 31, 2022, respectively)	(6,568,568)	(6,298,082)
Total real estate	19,598,101	19,496,442
Cash and cash equivalents (amounts related to VIEs of $256,201 and $259,658 at June 30, 2023 and December 31, 2022, respectively)	1,581,575	690,333
Cash held in escrows	46,915	46,479
Investments in securities	33,481	32,277
Tenant and other receivables, net (amounts related to VIEs of $13,921 and $16,521 at June 30, 2023 and December 31, 2022, respectively)	91,968	81,389
Related party note receivable, net	88,834	78,576
Sales-type lease receivable, net	13,250	12,811
Accrued rental income, net (amounts related to VIEs of $382,622 and $367,138 at June 30, 2023 and December 31, 2022, respectively)	1,318,320	1,276,580
Deferred charges, net (amounts related to VIEs of $172,655 and $176,597 at June 30, 2023 and December 31, 2022, respectively)	710,820	733,282
Prepaid expenses and other assets (amounts related to VIEs of $13,534 and $11,647 at June 30, 2023 and December 31, 2022, respectively)	77,457	43,589
Investments in unconsolidated joint ventures	1,780,959	1,715,911
Total assets	25,341,680	24,207,669
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,274,764 and $3,272,368 at June 30, 2023 and December 31, 2022, respectively)	3,274,764	3,272,368
Unsecured senior notes, net	10,985,395	10,237,968
Unsecured line of credit	0	0
Unsecured term loan	1,196,046	730,000
Lease liabilities - finance leases (amounts related to VIEs of $20,675 and $20,604 at June 30, 2023 and December 31, 2022, respectively)	251,874	249,335
Lease liabilities - operating leases	204,826	204,686
Accounts payable and accrued expenses (amounts related to VIEs of $57,852 and $29,466 at June 30, 2023 and December 31, 2022, respectively)	434,574	417,545
Dividends and distributions payable	171,465	170,643
Accrued interest payable	111,088	103,774
Other liabilities (amounts related to VIEs of $101,301 and $114,232 at June 30, 2023 and December 31, 2022, respectively)	418,813	450,918
Total liabilities	17,048,845	15,837,237
Redeemable deferred stock units— 108,642 and 97,853 units outstanding at redemption value at June 30, 2023 and December 31, 2022, respectively	$ 6,292	$ 6,613
Excess stock, shares outstanding	0	0
Excess stock, shares issued	0	0
Preferred stock / units, shares / units issued (in shares / units)	0	0
Preferred stock / units, shares / units outstanding (in shares / units)	0	0
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, none issued or outstanding	0	0
Common stock, $0.01 par value, 250,000,000 shares authorized, 156,932,300 and 156,836,767 issued and 156,853,400 and 156,757,867 outstanding at June 30, 2023 and December 31, 2022, respectively	1,569	1,568
Additional paid-in capital	6,561,161	6,539,147
Dividends in excess of earnings	(516,550)	(391,356)
Treasury common stock at cost, 78,900 shares at June 30, 2023 and December 31, 2022	(2,722)	(2,722)
Accumulated other comprehensive loss	(3,406)	(13,718)
Total stockholders' equity attributable to Boston Properties, Inc.	6,040,052	6,132,919
Noncontrolling interests:
Common units of the Operating Partnership	689,123	683,583
Property partnerships	1,557,368	1,547,317
Total equity / capital	8,286,543	8,363,819
Total liabilities and equity / capital	25,341,680	24,207,669
Boston Properties Limited Partnership
ASSETS
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $6,870,107 and $6,789,029 at June 30, 2023 and December 31, 2022, respectively)	25,396,457	25,022,149
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at June 30, 2023 and December 31, 2022, respectively)	237,526	237,510
Right of use assets - operating leases	166,421	167,351
Less: accumulated depreciation (amounts related to VIEs of $(1,434,592) and $(1,381,401) at June 30, 2023 and December 31, 2022, respectively)	(6,448,665)	(6,180,474)
Total real estate	19,351,739	19,246,536
Cash and cash equivalents (amounts related to VIEs of $256,201 and $259,658 at June 30, 2023 and December 31, 2022, respectively)	1,581,575	690,333
Cash held in escrows	46,915	46,479
Investments in securities	33,481	32,277
Tenant and other receivables, net (amounts related to VIEs of $13,921 and $16,521 at June 30, 2023 and December 31, 2022, respectively)	91,968	81,389
Related party note receivable, net	88,834	78,576
Sales-type lease receivable, net	13,250	12,811
Accrued rental income, net (amounts related to VIEs of $382,622 and $367,138 at June 30, 2023 and December 31, 2022, respectively)	1,318,320	1,276,580
Deferred charges, net (amounts related to VIEs of $172,655 and $176,597 at June 30, 2023 and December 31, 2022, respectively)	710,820	733,282
Prepaid expenses and other assets (amounts related to VIEs of $13,534 and $11,647 at June 30, 2023 and December 31, 2022, respectively)	77,457	43,589
Investments in unconsolidated joint ventures	1,780,959	1,715,911
Total assets	25,095,318	23,957,763
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $3,274,764 and $3,272,368 at June 30, 2023 and December 31, 2022, respectively)	3,274,764	3,272,368
Unsecured senior notes, net	10,985,395	10,237,968
Unsecured line of credit	0	0
Unsecured term loan	1,196,046	730,000
Lease liabilities - finance leases (amounts related to VIEs of $20,675 and $20,604 at June 30, 2023 and December 31, 2022, respectively)	251,874	249,335
Lease liabilities - operating leases	204,826	204,686
Accounts payable and accrued expenses (amounts related to VIEs of $57,852 and $29,466 at June 30, 2023 and December 31, 2022, respectively)	434,574	417,545
Dividends and distributions payable	171,465	170,643
Accrued interest payable	111,088	103,774
Other liabilities (amounts related to VIEs of $101,301 and $114,232 at June 30, 2023 and December 31, 2022, respectively)	418,813	450,918
Total liabilities	17,048,845	15,837,237
Redeemable deferred stock units— 108,642 and 97,853 units outstanding at redemption value at June 30, 2023 and December 31, 2022, respectively	6,292	6,613
Noncontrolling interest:
Redeemable partnership units— 16,522,540 and 16,531,172 common units and 2,135,852 and 1,679,175 long term incentive units outstanding at redemption value at June 30, 2023 and December 31, 2022, respectively	1,135,053	1,280,886
Equity / Capital:
Boston Properties Limited Partnership partners’ capital— 1,755,118 and 1,749,682 general partner units and 155,098,282 and 155,008,185 limited partner units outstanding at June 30, 2023 and December 31, 2022, respectively	5,351,166	5,299,428
Accumulated other comprehensive loss	(3,406)	(13,718)
Total partners’ capital	5,347,760	5,285,710
Noncontrolling interests in property partnerships	1,557,368	1,547,317
Noncontrolling interests:
Total equity / capital	6,905,128	6,833,027
Total liabilities and equity / capital	$ 25,095,318	$ 23,957,763