Investments in Non-controlled Entities Summary of Financial Information of Non-consolidated Entities - Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Real estate, net		$ 290,724
Other assets		223,123
Total assets		513,847
Mortgage and notes payable		121,627
Other liabilities		76,993
Total liabilities		198,620
Members’/partners’ equity		315,886
Non-controlling interest		(659)
Total equity		315,227
Total liabilities and equity		513,847
Our predecessor's share of equity—carrying value of our investments in non-controlled entities	0	76,879	72,626
Empire State Building Co. [Member]
Schedule of Equity Method Investments [Line Items]
Real estate, net		195,304
Other assets		145,949
Total assets		341,253
Mortgage and notes payable		0
Other liabilities		63,265
Total liabilities		63,265
Members’/partners’ equity		278,647
Non-controlling interest		(659)
Total equity		277,988
Total liabilities and equity		341,253
Our predecessor's share of equity—carrying value of our investments in non-controlled entities		66,179
1333 Broadway Associates [Member]
Schedule of Equity Method Investments [Line Items]
Real estate, net		38,212
Other assets		37,741
Total assets		75,953
Mortgage and notes payable		71,200
Other liabilities		4,050
Total liabilities		75,250
Members’/partners’ equity		703
Non-controlling interest		0
Total equity		703
Total liabilities and equity		75,953
Our predecessor's share of equity—carrying value of our investments in non-controlled entities		847
1350 Broadway Associates [Member]
Schedule of Equity Method Investments [Line Items]
Real estate, net		40,317
Other assets		22,150
Total assets		62,467
Mortgage and notes payable		50,427
Other liabilities		5,147
Total liabilities		55,574
Members’/partners’ equity		6,893
Non-controlling interest		0
Total equity		6,893
Total liabilities and equity		62,467
Our predecessor's share of equity—carrying value of our investments in non-controlled entities		3,446
501 Seventh Avenue Associates [Member]
Schedule of Equity Method Investments [Line Items]
Real estate, net		16,891
Other assets		17,283
Total assets		34,174
Mortgage and notes payable		0
Other liabilities		4,531
Total liabilities		4,531
Members’/partners’ equity		29,643
Non-controlling interest		0
Total equity		29,643
Total liabilities and equity		34,174
Our predecessor's share of equity—carrying value of our investments in non-controlled entities		$ 6,407