COMMITMENTS AND CONTINGENCIES (Details) - USD ($)		12 Months Ended		51 Months Ended
	Jul. 07, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016
Commitments
Amount of outstanding letters of credit and surety bonds		$ 118,900,000	$ 86,100,000	$ 118,900,000
South Street Seaport Ground Lease
Commitments
Annual fixed rent	$ 1,200,000
Annual rent escalation rate (as a percent)	3.00%
Additional annual rent payments to be made through the term of the lease	$ 210,000
Damage Due to Flooding
Commitments
Insurance recoveries collected				$ 54,100,000
Gain on insurance recoveries, recognized in other income		$ 6,200,000	$ 300,000