GOODWILL AND INTANGIBLE ASSETS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense on identifiable intangible assets	$ 25.0	$ 21.5	$ 20.6
Expected amortization expenses in Year one	30
Expected amortization expenses in Year two	30
Expected amortization expenses in Year three	30
Expected amortization expenses in Year four	30
Expected amortization expenses in Year five	30
Accumulated goodwill impairment loss	$ 369.3	$ 369.3