Investments in Unconsolidated Joint Ventures - Summary of Income from Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated joint ventures	$ 2,011		$ 2,986
Predecessor [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated joint ventures		$ 903		$ 2,035
712 Fifth Avenue [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%		50.00%
Income from unconsolidated joint ventures	$ 1,984		$ 2,925
712 Fifth Avenue [Member] | Predecessor [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%		50.00%
Income from unconsolidated joint ventures		934		2,024
1325 Avenue of the Americas [Member] | Predecessor [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated joint ventures		$ (31)		$ 11
Oder-Center, Germany [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	9.50%		9.50%
Income from unconsolidated joint ventures	$ 27		$ 61