SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2016 variable_interest_entity Investment	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Number of VIEs | variable_interest_entity	2
Number of investments in loans accounted for as real estate joint ventures | Investment	0
Prepaid expenses, deferred financing costs and other assets, net [Member]
Debt Instrument [Line Items]
Deferred financing costs		$ (17.3)
Long-term Debt [Member]
Debt Instrument [Line Items]
Deferred financing costs		$ 17.3