COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Net income attributable to noncontrolling interests	$ 7,500	$ 7,500	$ 7,500
Noncontrolling interest - preferred stock of subsidiaries	$ 155,570	$ 155,570