SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Risks and Uncertainties [Abstract]
Threshold percentage of sales (in hundredths)	10.00%
Revenue Recognition [Abstract]
Revenues recognized on contracts in process	$ 12,700,000	$ 15,900,000	$ 9,800,000
Minimum contract period	1 year
Maximum contract period	2 years
Unbilled costs and estimated earnings included in accounts receivable	5,100,000	8,500,000
Self-insured Insurance and Medical Claims [Abstract]
Workers compensation insurance reserves, per claim	100,000
Medical insurance reserves, per claim	250,000
Accrual for claims	$ 2,100,000	$ 1,800,000
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Building improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Building improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	Shorter of estimated useful life or related lease term