OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Accrued employee compensation	$ 41,144	$ 46,508
Customer deposits	30,484	31,216
Warranty	9,174	8,906
Contingent consideration	1,100	7,100
Other	22,256	21,125
Other current liabilities	$ 104,158	$ 114,855