OTHER FINANCIAL INFORMATION (SELF INSURANCE LIABILITIES TABLE) (DETAILS) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
OTHER FINANCIAL INFORMATION [ABSTRACT]
Worker's compensation	$ 1,523	$ 2,320
Employee health and dental insurance	4,908	4,429
Other insurance		1,202
Total self insurance liabilities	$ 6,431	$ 7,951