LONG-TERM DEBT (Details - Schedule of Maturities of Long-Term Debt) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Long-term Debt, Current and Noncurrent [Abstract]
2016	$ 20,000
2017	35,000
2018	55,000
2019	255,000
Long-term debt, including current maturities	$ 365,000	$ 385,000