OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Liabilities Disclosure [Abstract]
Accrued employee compensation	$ 40,568	$ 41,144
Customer deposits	37,716	30,484
Warranty	9,623	9,174
Other	40,938	23,356
Other current liabilities	$ 128,845	$ 104,158