Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Commercial real estate properties, at cost:
Land	$ 201,196	$ 201,196
Development costs	8,064	7,966
Building and improvements	2,959,259	2,924,804
Commercial real estate properties, at cost	3,168,519	3,133,966
Less: accumulated depreciation	(1,007,429)	(941,612)
Commercial real estate properties, net	2,161,090	2,192,354
Cash and cash equivalents	540,604	526,714
Restricted cash	37,966	41,225
Tenant and other receivables	19,238	21,541
Deferred rent receivables	231,143	222,508
Prepaid expenses and other assets	71,399	77,182
Deferred costs, net	200,735	203,853
Acquired below-market ground leases, net	340,820	344,735
Right of use assets	28,998	29,104
Goodwill	491,479	491,479
Total assets	4,123,472	4,150,695
Liabilities:
Mortgage notes payable, net	774,612	775,929
Senior unsecured notes, net	973,267	973,159
Unsecured term loan facilities, net	387,954	387,561
Unsecured revolving credit facility	0	0
Accounts payable and accrued expenses	89,254	103,203
Acquired below-market leases, net	28,532	31,705
Ground lease liabilities	28,998	29,104
Deferred revenue and other liabilities	81,762	88,319
Tenants’ security deposits	25,885	30,408
Total liabilities	2,390,264	2,419,388
Commitments and contingencies
Empire State Realty Trust, Inc. stockholders' equity:
Preferred stock, $0.01 par value, 50,000 shares authorized, none issued or outstanding	0	0
Additional paid-in capital	1,151,979	1,147,527
Accumulated other comprehensive loss	(24,794)	(28,320)
Retained deficit	(73,260)	(65,673)
Total Empire State Realty Trust, Inc. stockholders' equity	1,055,659	1,055,249
Non-controlling interests in operating partnership	647,609	646,118
Private perpetual preferred units:
Total equity	1,733,208	1,731,307
Total liabilities and equity	4,123,472	4,150,695
Class A Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	1,724	1,705
Class B Common Stock
Empire State Realty Trust, Inc. stockholders' equity:
Common stock	10	10
Private Perpetual Preferred Units, Series 2019
Private perpetual preferred units:
Private perpetual preferred units	21,936	21,936
Private Perpetual Preferred Units, Series 2014
Private perpetual preferred units:
Private perpetual preferred units	$ 8,004	$ 8,004