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Capital - Additional Information and Private Perpetual Preferred Units (Details) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	May 16, 2019
Shares and Units [Abstract]
OP units outstanding (in shares)	297,676,225
Dividends on common stock received until performance criteria met for LTIP units (as a percent)	10.00%
Dividends on common stock received after performance criteria met for LTIP units (as a percent)	90.00%
Dividends on common stock received in periods after performance criteria met for LTIP units (as a percent)	100.00%
Dividends declared (in USD per share)	$ 0.105	$ 0.105
2019 Plan
Shares and Units [Abstract]
Number of shares authorized under the plan (in shares)	11,000,000.0			11,000,000.0
Empire State Realty Trust
Shares and Units [Abstract]
OP units owned by the Company (in shares)	177,128,009
Other Partners, Certain Directors, Officers And Other Members Of Executive Management
Shares and Units [Abstract]
OP units not owned by the Company (in shares)	120,548,216
Empire State Realty OP | Empire State Realty Trust
Shares and Units [Abstract]
OP units owned by the Company (as a percent)	59.50%
Empire State Realty OP | Other Partners, Certain Directors, Officers And Other Members Of Executive Management
Shares and Units [Abstract]
OP units not owned by the Company (as a percent)	40.50%
Private Perpetual Preferred Units, Series 2019
Shares and Units [Abstract]
Private perpetual preferred units, issued (in shares)	4,664,038		4,610,383
Private perpetual preferred units, liquidation preference (in USD per share)	$ 13.52		$ 13.52
Preferred units cumulative cash distributions (in USD per share)	$ 0.70
Private Perpetual Preferred Units, Series 2014
Shares and Units [Abstract]
Private perpetual preferred units, issued (in shares)	1,560,360		1,560,360
Private perpetual preferred units issued during period (in shares)	1,560,360
Private perpetual preferred units, liquidation preference (in USD per share)	$ 16.62		$ 16.62
Dividends declared (in USD per share)	$ 0.60

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