COMMITMENTS AND CONTINGENCIES (Details) - Self Insurance	12 Months Ended
	Dec. 31, 2016 USD ($)
COMMITMENTS AND CONTINGENCIES
Retains of liability for individual health	$ 250,000
Maximum annual liability per insured	250,000
Minimum Amount Of Claims For Computation Of Variable Portion Of Maximum Liability For Health Plan Per Insured Per Year	$ 250,000
Variable portion of maximum annual liability per insured (as a percent)	10.00%
Maximum liability for workers' compensation under stop-loss agreement per claim	$ 500,000