Document and Entity Information Document	3 Months Ended
	Mar. 31, 2015	Apr. 28, 2015
Entity Registrant Name	Empire State Realty Trust, Inc.
Entity Central Index Key	0001541401
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Period End Date	Mar. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Entity Filer Category	Non-accelerated Filer
Common Class A [Member]
Entity Common Stock, Shares Outstanding		111,468,815
Common Class B [Member]
Entity Common Stock, Shares Outstanding		1,140,031