RESTRUCTURING AND PLANT CLOSURE COSTS - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Significant Acquisitions and Disposals [Line Items]
Accrual balance related to restructuring	$ 893,000	$ 2,052,000	$ 672,000
Charges during period	2,319,000	8,371,000
Non cash expenses related to rationalization of domestic plant operation	2,800,000	900,000
Cost of revenues
Significant Acquisitions and Disposals [Line Items]
Charges during period	54,000
Reorganization of International Management Group Structure
Significant Acquisitions and Disposals [Line Items]
Accrual balance related to restructuring	$ 900,000