OTHER FINANCIAL INFORMATION (SELF INSURANCE LIABILITIES TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
OTHER FINANCIAL INFORMATION [ABSTRACT]
Worker's compensation	$ 2,179	$ 2,507
Employee health and dental insurance	4,926	3,324
Other insurance	915	1,225
Total self insurance liabilities	$ 8,020	$ 7,056