Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Commercial real estate properties, at cost:
Land	$ 201,196	$ 201,196
Development costs	7,931	7,498
Building and improvements	2,089,792	2,067,636
Commercial real estate properties, at cost, gross	2,298,919	2,276,330
Less: accumulated depreciation	(490,427)	(465,584)
Commercial real estate properties, net	1,808,492	1,810,746
Cash and cash equivalents	44,440	46,685
Restricted cash	60,165	65,880
Tenant and other receivables, net of allowance of $3,364 and $2,792 in 2016 and 2015, respectively	14,828	18,782
Deferred rent receivables, net of allowance of $231 and $245 in 2016 and 2015, respectively	127,148	122,048
Prepaid expenses and other assets	29,908	50,460
Deferred costs, net	304,977	310,679
Acquired below-market ground leases, net	381,934	383,891
Goodwill	491,479	491,479
Total assets	3,263,371	3,300,650
Liabilities:
Mortgage notes payable, net	772,015	747,661
Senior unsecured notes, net	587,861	587,018
Unsecured term loan facility, net	262,640	262,545
Unsecured revolving credit facility, net	0	35,192
Accounts payable and accrued expenses	119,104	111,099
Acquired below-market leases, net	96,245	104,171
Deferred revenue and other liabilities	26,802	31,388
Tenants’ security deposits	49,729	48,890
Total liabilities	$ 1,914,396	$ 1,927,964
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	476,107	469,152
Accumulated other comprehensive loss	(9,626)	(883)
Retained earnings	52,370	55,260
Total Empire State Realty Trust, Inc.'s stockholders' equity	520,068	524,729
Non-controlling interests in operating partnership	820,903	839,953
Private perpetual preferred units, $16.62 per unit liquidation preference, 1,560,360 issued and outstanding in 2016 and 2015	8,004	8,004
Total equity	1,348,975	1,372,686
Total liabilities and equity	3,263,371	3,300,650
Class A Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	1,206	1,189
Class B Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	$ 11	$ 11