SUBSEQUENT EVENTS (Details) (70 Columbia Corporate Center, USD $) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2014	Aug. 15, 2012	Apr. 15, 2014 Subsequent event
Subsequent events
Cash paid in full satisfaction of loan assumed as part of the acquisition			$ 17.0
Amount of debt assumed as part of the acquisition		16.0
Percentage of appreciation in the market value of building	30.00%
Percentage of cumulative preferred return on the property	10.00%
Amount of participation right			0.7
Appraised value for the property			$ 28.0