Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Commercial real estate properties, at cost:
Land	$ 201,196	$ 201,196
Development costs	7,978	7,951
Building and improvements	2,398,964	2,249,482
Commercial real estate properties, at cost, gross	2,608,138	2,458,629
Less: accumulated depreciation	(631,916)	(556,546)
Commercial real estate properties, net	1,976,222	1,902,083
Cash and cash equivalents	432,105	554,371
Restricted cash	64,020	61,514
Tenant and other receivables, net of allowance of $3,504 and $3,333 in 2017 and 2016, respectively	34,661	22,542
Deferred rent receivables, net of allowance of $187 and $390 in 2017 and 2016, respectively	172,665	152,074
Prepaid expenses and other assets	39,463	53,749
Deferred costs, net	268,132	277,081
Acquired below-market ground leases, net	370,187	376,060
Goodwill	491,479	491,479
Total assets	3,848,934	3,890,953
Liabilities:
Mortgage notes payable, net	720,830	759,016
Senior unsecured notes, net	592,914	590,388
Unsecured term loan facility, net	263,546	262,927
Unsecured revolving credit facility	0	0
Accounts payable and accrued expenses	142,690	134,064
Acquired below-market leases, net	70,013	82,300
Deferred revenue and other liabilities	41,320	32,212
Tenants’ security deposits	47,395	47,183
Total liabilities	1,878,708	1,908,090
Commitments and contingencies
Empire State Realty Trust, Inc. stockholders' equity:
Preferred stock	0	0
Additional paid-in capital	1,116,026	1,104,463
Accumulated other comprehensive loss	(10,425)	(2,789)
Retained earnings	46,436	50,904
Total Empire State Realty Trust, Inc.'s stockholders' equity	1,153,631	1,154,136
Non-controlling interests in operating partnership	808,591	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	1,970,226	1,982,863
Total liabilities and equity	3,848,934	3,890,953
Class A Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	1,583	1,547
Class B Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	$ 11	$ 11