EQUITY - Non-controlling Interests and Other Joint Venture Interests (Details 2) $ in Millions		12 Months Ended
	Jun. 30, 2016 USD ($)	Dec. 31, 2016 shares	Dec. 31, 2015 shares	Jul. 31, 2016
Operating Partnership state and local income tax expense | Unaffiliated third parties
Non-controlling Interests and Other Joint Venture Interests
Conversion ratio of limited partner common units into common stock		1
Number of common units of operating partnership owned by unaffiliated third parties | shares		396,713	516,021
Percentage of limited partnership interest in operating partnership		1.00%	1.00%
Leasehold Venture
Non-controlling Interests and Other Joint Venture Interests
Payments to Acquire Interest in Joint Venture | $	$ 0.4
Ownership interest (as a percent)				100.00%