Investments in Non-controlled Entities Summary of Financial Information of Non-consolidated Entities - Statements of Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013	Oct. 06, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:
Rental revenue and other		$ 143,637		$ 188,307	$ 170,282
Observatory revenue		76,687		91,870	80,562
Total revenue		220,324		280,177	250,844
Expenses:
Operating expenses—rental		114,255		150,778	152,950
Operating expenses—overage rent		11,000		26,696	30,325
Operating expenses—observatory		17,150		20,709	20,009
Interest		6,081		7,741	7,442
Depreciation and amortization		17,574		19,712	23,873
Total expenses		166,060		225,636	234,599
Net income		54,264		54,541	16,245
Our predecessor's share of equity in net income of non-controlled entities	0	14,875	14,875	14,348	3,893
Empire State Building Co. [Member]
Revenue:
Rental revenue and other		101,496		133,666	118,720
Observatory revenue		76,687		91,870	80,562
Total revenue		178,183		225,536	199,282
Expenses:
Operating expenses—rental		89,670		119,482	122,381
Operating expenses—overage rent		10,894		24,199	28,780
Operating expenses—observatory		17,150		20,709	20,009
Interest		0		0	0
Depreciation and amortization		10,997		13,615	15,833
Total expenses		128,711		178,005	187,003
Net income		49,472		47,531	12,279
Our predecessor's share of equity in net income of non-controlled entities		13,467		11,015	2,158
1333 Broadway Associates [Member]
Revenue:
Rental revenue and other		11,711		14,539	14,670
Observatory revenue		0		0	0
Total revenue		11,711		14,539	14,670
Expenses:
Operating expenses—rental		5,766		7,528	7,072
Operating expenses—overage rent		0		0	0
Operating expenses—observatory		0		0	0
Interest		3,620		4,748	4,741
Depreciation and amortization		2,186		1,112	3,053
Total expenses		11,572		13,388	14,866
Net income		139		1,151	(196)
Our predecessor's share of equity in net income of non-controlled entities		70		576	391
1350 Broadway Associates [Member]
Revenue:
Rental revenue and other		16,439		21,275	19,179
Observatory revenue		0		0	0
Total revenue		16,439		21,275	19,179
Expenses:
Operating expenses—rental		7,989		10,667	10,328
Operating expenses—overage rent		0		0	0
Operating expenses—observatory		0		0	0
Interest		2,461		2,993	2,701
Depreciation and amortization		3,264		3,489	3,117
Total expenses		13,714		17,149	16,146
Net income		2,725		4,126	3,033
Our predecessor's share of equity in net income of non-controlled entities		1,179		2,063	935
501 Seventh Avenue Associates [Member]
Revenue:
Rental revenue and other		13,991		18,827	17,713
Observatory revenue		0		0	0
Total revenue		13,991		18,827	17,713
Expenses:
Operating expenses—rental		10,830		13,101	13,169
Operating expenses—overage rent		106		2,497	1,545
Operating expenses—observatory		0		0	0
Interest		0		0	0
Depreciation and amortization		1,127		1,496	1,870
Total expenses		12,063		17,094	16,584
Net income		1,928		1,733	1,129
Our predecessor's share of equity in net income of non-controlled entities		$ 159		$ 694	$ 409