Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Real estate, at cost (amounts includes variable interest entities (“VIEs”) at June 30, 2016)	$ 18,690,403	$ 18,465,405
Construction in progress (amounts related to VIEs of $567,609 at June 30, 2016)	865,359	763,935
Land held for future development	241,106	252,195
Less: accumulated depreciation (includes amounts related to VIEs at June 30, 2016)	(4,056,716)	(3,925,894)
Total real estate	15,740,152	15,555,641
Cash and cash equivalents (amounts related to VIEs of $214,595 at June 30, 2016)	1,180,044	723,718
Cash held in escrows (amounts related to VIEs of $3,527 at June 30, 2016)	65,654	73,790
Investments in securities	21,775	20,380
Tenant and other receivables (amounts related to VIEs of $19,719 at June 30, 2016)	84,861	97,865
Accrued rental income (amounts related to VIEs of $220,277 at June 30, 2016)	776,816	754,883
Deferred charges, net (amounts related to VIEs of $320,317 at June 30, 2016)	697,823	704,867
Prepaid expenses and other assets (amounts related to VIEs of $84,345 at June 30, 2016)	144,222	185,118
Investments in unconsolidated joint ventures	252,618	235,224
Total assets	18,963,965	18,351,486
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $2,046,828 at June 30, 2016)	3,189,013	3,435,242
Unsecured senior notes, net	6,257,274	5,264,819
Unsecured line of credit	0	0
Mezzanine notes payable (amounts related to VIEs of $307,797 at June 30, 2016)	307,797	308,482
Outside members' notes payable (amounts related to VIEs of $180,000 at June 30, 2016)	180,000	180,000
Accounts payable and accrued expenses (amounts related to VIEs of $109,038 at June 30, 2016)	287,464	274,709
Dividends and distributions payable	113,071	327,320
Accrued interest payable (amounts related to VIEs of $144,327 at June 30, 2016)	222,175	190,386
Other liabilities (amounts related to VIEs of $195,437 at June 30, 2016)	508,952	483,601
Total liabilities	11,065,746	10,464,559
Commitments and contingencies	0	0
Equity / Capital
Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding	0	0
Preferred stock, $.01 par value, 50,000,000 shares authorized
5.25% Series B cumulative redeemable preferred stock / unit liquidation preference $2,500 per share / unit, 92,000 shares / units authorized, 80,000 shares / units issued and outstanding at June 30, 2016 and December 31, 2015	200,000	200,000
Common stock, $0.01 par value, 250,000,000 shares authorized, 153,753,830 and 153,658,866 issued and 153,674,930 and 153,579,966 outstanding at June 30, 2016 and December 31, 2015, respectively	1,537	1,536
Additional paid-in capital	6,316,191	6,305,687
Dividends in excess of earnings	(702,361)	(780,952)
Treasury common stock at cost, 78,900 shares at June 30, 2016 and December 31, 2015	(2,722)	(2,722)
Accumulated other comprehensive loss	(79,748)	(14,114)
Total stockholders’ equity attributable to Boston Properties, Inc.	5,732,897	5,709,435
Noncontrolling interests:
Common units of the Operating Partnership	612,385	603,092
Property partnerships	1,552,937	1,574,400
Total equity / capital	7,898,219	7,886,927
Total liabilities and equity / capital	18,963,965	18,351,486
Boston Properties Limited Partnership
ASSETS
Real estate, at cost (amounts includes variable interest entities (“VIEs”) at June 30, 2016)	18,272,679	18,045,011
Construction in progress (amounts related to VIEs of $567,609 at June 30, 2016)	865,359	763,935
Land held for future development	241,106	252,195
Less: accumulated depreciation (includes amounts related to VIEs at June 30, 2016)	(3,974,168)	(3,846,816)
Total real estate	15,404,976	15,214,325
Cash and cash equivalents (amounts related to VIEs of $214,595 at June 30, 2016)	1,180,044	723,718
Cash held in escrows (amounts related to VIEs of $3,527 at June 30, 2016)	65,654	73,790
Investments in securities	21,775	20,380
Tenant and other receivables (amounts related to VIEs of $19,719 at June 30, 2016)	84,861	97,865
Accrued rental income (amounts related to VIEs of $220,277 at June 30, 2016)	776,816	754,883
Deferred charges, net (amounts related to VIEs of $320,317 at June 30, 2016)	697,823	704,867
Prepaid expenses and other assets (amounts related to VIEs of $84,345 at June 30, 2016)	144,222	185,118
Investments in unconsolidated joint ventures	252,618	235,224
Total assets	18,628,789	18,010,170
Liabilities:
Mortgage notes payable, net (amounts related to VIEs of $2,046,828 at June 30, 2016)	3,189,013	3,435,242
Unsecured senior notes, net	6,257,274	5,264,819
Unsecured line of credit	0	0
Mezzanine notes payable (amounts related to VIEs of $307,797 at June 30, 2016)	307,797	308,482
Outside members' notes payable (amounts related to VIEs of $180,000 at June 30, 2016)	180,000	180,000
Accounts payable and accrued expenses (amounts related to VIEs of $109,038 at June 30, 2016)	287,464	274,709
Dividends and distributions payable	113,071	327,320
Accrued interest payable (amounts related to VIEs of $144,327 at June 30, 2016)	222,175	190,386
Other liabilities (amounts related to VIEs of $195,437 at June 30, 2016)	508,952	483,601
Total liabilities	11,065,746	10,464,559
Commitments and contingencies	0	0
Noncontrolling interest:
Redeemable partnership units—17,184,629 and 16,097,473 common units and 912,605 and 1,831,714 long term incentive units outstanding at redemption value at June 30, 2016 and December 31, 2015, respectively	2,387,025	2,286,689
Redeemable interest in property partnership	1,552,937	1,574,400
Preferred stock, $.01 par value, 50,000,000 shares authorized
5.25% Series B cumulative redeemable preferred stock / unit liquidation preference $2,500 per share / unit, 92,000 shares / units authorized, 80,000 shares / units issued and outstanding at June 30, 2016 and December 31, 2015	193,623	193,623
Accumulated other comprehensive loss	(91,532)	(18,337)
Noncontrolling interests:
Boston Properties Limited Partnership partners’ capital—1,717,722 and 1,715,092 general partner units and 151,957,208 and 151,864,874 limited partner units outstanding at June 30, 2016 and December 31, 2015, respectively	3,429,458	3,490,899
Total equity / capital	5,176,018	5,258,922
Total liabilities and equity / capital	$ 18,628,789	$ 18,010,170