CONVERTIBLE REDEEMABLE PREFERRED SHARES (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jun. 25, 2013	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Temporary Equity [Line Items]
Temporary equity		$ 269,370	$ 264,593
Accretion on Series B Convertible Redeemable Preferred Stock		$ 4,777	$ 9,694	$ 13,701
Series B Preferred Stock [Member]
Temporary Equity [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 0.08	$ 0.08	$ 0.08
Preferred Stock, Shares Outstanding		200,000	200,000
Convertible Preferred Stock, Estimated Common Stock Issued in Future Conversion		111,100,000
Sale of Stock, Price Per Share	1,000
Preferred Stock, Conversion Basis	$ 2.42
Series B Preferred Stock [Member] | 1 - 3 years [Member]
Temporary Equity [Line Items]
Preferred Stock, Dividend Rate, Percentage		3.75%