Equity - Earnings Per Share (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2013
Numerator:
Net income attributable to Empire State Realty Trust, Inc. - basic and diluted	$ 75,245	$ 30,731	[1]
Denominator:
Weighted average shares outstanding - basic (in shares)	95,574
Effective of dilutive securities - share-based compensation	37
Weighted average shares outstanding - dilutive	95,611

[1] The results of operations of our predecessor for October 1, 2013 through October 6, 2013 and the results of operations of our company for October 7, 2013 through December 31, 2013 have been combined.