Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Commercial real estate properties, at cost:
Land	$ 201,196	$ 201,196
Development costs	7,977	7,951
Building and improvements	2,292,363	2,249,482
Commercial real estate properties, at cost, gross	2,501,536	2,458,629
Less: accumulated depreciation	(581,703)	(556,546)
Commercial real estate properties, net	1,919,833	1,902,083
Cash and cash equivalents	532,442	554,371
Restricted cash	62,464	61,514
Tenant and other receivables, net of allowance of $3,994 and $3,333 in 2017 and 2016, respectively	20,580	22,542
Deferred rent receivables, net of allowance of $264 and $390 in 2017 and 2016, respectively	158,005	152,074
Prepaid expenses and other assets	36,815	53,749
Deferred costs, net	270,456	277,081
Acquired below-market ground leases, net	374,102	376,060
Goodwill	491,479	491,479
Total assets	3,866,176	3,890,953
Liabilities:
Mortgage notes payable, net	754,548	759,016
Senior unsecured notes, net	591,232	590,388
Unsecured term loan facility, net	263,019	262,927
Unsecured revolving credit facility	0	0
Accounts payable and accrued expenses	125,910	134,064
Acquired below-market leases, net	78,246	82,300
Deferred revenue and other liabilities	31,097	32,212
Tenants’ security deposits	47,198	47,183
Total liabilities	1,891,250	1,908,090
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	1,112,363	1,104,463
Accumulated other comprehensive loss	(2,074)	(2,789)
Retained earnings	44,407	50,904
Total Empire State Realty Trust, Inc.'s stockholders' equity	1,156,273	1,154,136
Non-controlling interests in operating partnership	810,649	820,723
Private perpetual preferred units, $16.62 per unit liquidation preference, 1,560,360 issued and outstanding in 2017 and 2016	8,004	8,004
Total equity	1,974,926	1,982,863
Total liabilities and equity	3,866,176	3,890,953
Class A Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	1,566	1,547
Class B Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	$ 11	$ 11