FAIR VALUE OF FINANCIAL INSTRUMENTS - Nonrecurring Fair Values (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	May 01, 2019	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Impairment of real estate		$ 0	$ 1,400	$ 0	$ 1,350	$ 0
Operating lease income	$ 3,900	24,405			81,106
Loss on sale of real estate	3,500
Depreciation and amortization	400	$ 9,030		$ 10,417	$ 29,192	$ 31,896
Loss on sale of real estate	$ 20