Fee and Other Income - Schedule of Fee and Other Income (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Fee And Other Income [Line Items]
Lease termination income	$ 895	$ 93	$ 961	$ 11,048
1633 Broadway [Member]
Fee And Other Income [Line Items]
Lease termination income				$ 10,861