COMMITMENTS, CONTINGENCIES, CONCENTRATIONS OF RISK AND LITIGATION - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Loss Contingencies [Line Items]
Rent Expense	$ 26.0	$ 25.7	$ 26.6
Sublease Income	$ 0.1	$ 0.1	$ 0.2
Minimum
Loss Contingencies [Line Items]
Initial lease terms	2 years
Maximum
Loss Contingencies [Line Items]
Initial lease terms	25 years