ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2006	Dec. 28, 2006
ACCOUNTING POLICIES [Abstract]
Percentage of revenue included claims and unpriced change orders (in hundredths)	0.50%
Sell and lease back of real estate properties		$ 10,250
Amount of the sale price in excess of book value			$ 4,242
Lease term of property	18 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	35 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	4 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Purchased Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Purchased Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives	4 years