Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Rental revenue	$ 92,210		$ 182,414
Tenant expense reimbursement	14,304		29,457
Observatory revenue	30,389		47,690
Construction revenue	12,963		27,926
Third-party management and other fees	753		1,364
Other revenue and fees	4,549		6,623
Total revenues	155,168	59,569	295,474	121,989
Operating expenses:
Property operating expenses	35,596		71,907
Marketing, general, and administrative expenses	12,189		20,864
Observatory expenses	7,120		14,101
Construction expenses	12,795		27,078
Real estate taxes	18,186		36,559
Formation transaction expenses	0		0
Depreciation and amortization	28,637		58,752
Total operating expenses	114,523		229,261
Total operating income	40,645		66,213
Other income (expense):
Equity in net income of non-controlled entities	0	7,898	0	7,898
Interest expense	(14,629)		(28,966)
Business Combination, Acquisition Related Costs	(735)	0	(735)	0
Net income	25,281	3,071	36,512	5,001
Net income attributable to the predecessor	0		0
Net income attributable to non-controlling interests	(15,447)		(22,309)
Net income attributable to Empire State Realty Trust, Inc.	9,834		14,203
Total weighted average shares:
Basic	95,573		95,574
Diluted	95,615		95,616
Net income per share attributable to Empire State Realty Trust, Inc.:
Basic	$ 0.10		$ 0.15
Diluted	$ 0.10		$ 0.15
Dividends per share	$ 0.085		$ 0.17
Predecessor [Member]
Revenues:
Rental revenue		43,639		88,905
Tenant expense reimbursement		7,045		13,634
Observatory revenue		0		0
Construction revenue		6,218		12,400
Third-party management and other fees		1,526		4,183
Other revenue and fees		1,141		2,867
Total revenues		59,569		121,989
Operating expenses:
Property operating expenses		12,152		25,958
Marketing, general, and administrative expenses		6,849		13,174
Observatory expenses		0		0
Construction expenses		6,529		12,789
Real estate taxes		7,916		15,787
Formation transaction expenses		1,305		3,000
Depreciation and amortization		13,111		25,267
Total operating expenses		47,862		95,975
Total operating income		11,707		26,014
Other income (expense):
Equity in net income of non-controlled entities		6,079		7,898
Interest expense		(14,715)		(28,911)
Net income		3,071		5,001
Net income attributable to the predecessor		(3,071)		(5,001)
Net income attributable to non-controlling interests		0		0
Net income attributable to Empire State Realty Trust, Inc.		$ 0		$ 0