Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Real estate, at cost	$ 18,207,934	$ 18,231,978
Construction in progress	880,996	736,311
Land held for future development	277,327	268,114
Less: accumulated depreciation	(3,753,926)	(3,547,659)
Total real estate	15,612,331	15,688,744
Cash and cash equivalents	1,342,751	1,763,079
Cash held in escrows	252,558	487,321
Investments in securities	20,953	19,459
Tenant and other receivables (net of allowance for doubtful accounts of $1,061 and $1,142, respectively)	55,183	46,595
Accrued rental income (net of allowance of $1,219 and $1,499, respectively)	730,797	691,999
Deferred charges, net	771,419	831,744
Prepaid expenses and other assets	117,993	164,432
Investments in unconsolidated joint ventures	209,974	193,394
Total assets	19,113,959	19,886,767
Liabilities:
Mortgage notes payable	4,269,808	4,309,484
Unsecured senior notes (net of discount of $11,497 and $12,296, respectively)	5,288,503	5,287,704
Unsecured line of credit	0	0
Mezzanine notes payable	309,148	309,796
Outside members' notes payable	180,000	180,000
Accounts payable and accrued expenses	231,900	243,263
Dividends and distributions payable	112,892	882,472
Accrued interest payable	178,548	163,532
Other liabilities	448,480	502,255
Total liabilities	11,019,279	11,878,506
Commitments and contingencies	0	0
Noncontrolling interest:
Redeemable preferred units of the Operating Partnership	0	633
Redeemable interest in property partnership	106,233	104,692
Equity:
Excess stock, $.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, $.01 par value, liquidation preference $2,500 per share, 92,000 shares authorized, 80,000 shares issued and outstanding at June 30, 2015 and December 31, 2014	200,000	200,000
Common stock, $.01 par value, 250,000,000 shares authorized, 153,552,831 and 153,192,845 issued and 153,473,931 and 153,113,945 outstanding at June 30, 2015 and December 31, 2014, respectively	1,535	1,531
Additional paid-in capital	6,293,556	6,270,257
Dividends in excess of earnings	(711,239)	(762,464)
Treasury common stock at cost, 78,900 shares at June 30, 2015 and December 31, 2014	(2,722)	(2,722)
Accumulated other comprehensive income (loss)	1,848	(9,304)
Total stockholders’ equity attributable to Boston Properties, Inc.	5,782,978	5,697,298
Noncontrolling interests:
Common units of the Operating Partnership	614,988	603,171
Property partnerships	1,590,481	1,602,467
Total equity	7,988,447	7,902,936
Total liabilities and equity	$ 19,113,959	$ 19,886,767