Investments in Unconsolidated Joint Ventures - Summary of Income from Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated joint ventures	$ 1,458		$ 4,444
Predecessor [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated joint ventures		$ 1,777		$ 3,812
712 Fifth Avenue [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	50.00%		50.00%
Income from unconsolidated joint ventures	$ 1,433		$ 4,358
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		1,845		3,869
1325 Avenue of the Americas [Member] | Predecessor [Member]
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated joint ventures		$ (68)		$ (57)
Oder-Center, Germany [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	9.50%		9.50%
Income from unconsolidated joint ventures	$ 25		$ 86