DERIVATIVE INSTRUMENTS (Summary of Fair Value in Balance Sheet for Derivatives Designated Hedging Instruments) (Parenthetical) (Detail) (Interest Rate Swap, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Notional amount of interest rate derivatives	$ 123.8	$ 127.5
Reduction in notional amount of interest rate derivatives in next twelve months	$ 15.0