COMMITMENTS AND CONTINGENCIES (Details) - USD ($)		3 Months Ended		27 Months Ended
	Jun. 27, 2013	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Dec. 31, 2015
Commitments
Amount of outstanding letters of credit and surety bonds		$ 91,600,000		$ 91,600,000	$ 86,100,000
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 | South Street Seaport Ground Lease
Commitments
Insurance recoveries collected		$ 0	$ 300,000	$ 47,900,000