INCOME TAXES - Foreign Rate Differentials (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Foreign Rate Differential [Line Items]
Foreign income tax	$ 37,912	$ 46,391
Cayman Islands
Income Tax Foreign Rate Differential [Line Items]
Statutory Tax Rate	0.00%
Foreign income tax	$ 31,560	39,954
Hong Kong
Income Tax Foreign Rate Differential [Line Items]
Statutory Tax Rate	16.50%
Foreign income tax	$ 3,545	3,315
China
Income Tax Foreign Rate Differential [Line Items]
Statutory Tax Rate	25.00%
Foreign income tax	$ 2,725	$ 2,584