Consolidated Statements of Cash Flows (Parentheticals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Liability for real estate additions due to Vornado	$ 192	$ 1,931
Vornado | Development fees
Liability for real estate additions due to Vornado	$ 52	$ 36