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PENSION PLANS - Additional Information (Detail)	3 Months Ended	12 Months Ended
PENSION PLANS - Additional Information (Detail)	Jun. 30, 2011	Dec. 31, 2010
Investment strategy, fixed income percentage	85.00%
Investment strategy, equities percentage	15.00%
Expected rate of return on plan assets	6.50%	5.75%
Discount rate assumption	5.40%	5.30%

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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