Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Commercial real estate properties, at cost:
Land	$ 201,196	$ 201,196
Development costs	7,388	6,986
Building and improvements	1,996,318	1,931,681
Commercial real estate properties, at cost, gross	2,204,902	2,139,863
Less: accumulated depreciation	(423,279)	(377,552)
Commercial real estate properties, net	1,781,623	1,762,311
Cash and cash equivalents	34,221	45,732
Restricted cash	69,709	60,273
Tenant and other receivables, net of allowance of $2,401 and $1,427 in 2015 and 2014, respectively	16,431	23,745
Deferred rent receivables, net of allowance of $147 and $420 in 2015 and 2014, respectively	111,897	102,104
Prepaid expenses and other assets	47,857	48,504
Deferred costs, net	352,940	370,460
Acquired below-market ground leases, net	387,807	391,887
Goodwill	491,479	491,479
Total assets	3,293,964	3,296,495
Liabilities:
Mortgage notes payable	759,405	903,985
Senior unsecured notes	589,002	237,667
Unsecured revolving credit facility	285,000	0
Term loan and credit facility	0	470,000
Accounts payable and accrued expenses	101,674	96,563
Acquired below-market leases, net	121,286	138,859
Deferred revenue and other liabilities	18,713	27,876
Tenants’ security deposits	46,338	40,448
Total liabilities	$ 1,921,418	$ 1,915,398
Commitments and contingencies
Empire State Realty Trust, Inc. stockholders' equity:
Preferred stock, $0.01 par value per share, 50,000,000 shares authorized, none issued or outstanding	$ 0	$ 0
Additional paid-in capital	435,632	406,853
Retained earnings	55,903	60,713
Total Empire State Realty Trust, Inc.'s stockholders' equity	492,677	468,638
Non-controlling interests in operating partnership	871,865	904,455
Private perpetual preferred units, $16.62 per unit liquidation preference, 1,560,360 issued and outstanding in 2015 and 2014	8,004	8,004
Total equity	1,372,546	1,381,097
Total liabilities and equity	3,293,964	3,296,495
Common Class A
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	1,131	1,060
Common Class B
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	$ 11	$ 12