LONG-TERM DEBT (Details - Components of Long-Term Debt) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Term loan facility	$ 345,000	$ 365,000
Debt issuance costs, net	(6,661)	(9,888)
Total debt	338,339	355,112
Current maturities of long-term debt	(35,000)	(20,000)
Current debt issuance costs, net	3,134	3,254
Total long-term debt, less current portion	$ 306,473	$ 338,366