Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Fees to Vornado	$ 1,091	$ 1,048	$ 2,219	$ 2,309
Management fees to Vornado	$ 595	$ 595	$ 1,190	$ 1,190