DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Derivative Instruments in Statement of Financial Position at Fair Value) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Derivative Instruments in Statement of Financial Position at Fair Value
Fixed interest rate related to interest rate swap agreement	2.92%
Interest Rate Cash Flow Hedge Liability at Fair Value	$ 0	$ 2.4
Other liabilities	0	2.4
Minimum percentage of market price to calculated value of zero-coupon subordinated debt at which the entity is subject to contingent cash interest	120.00%
Balance Sheet Location, Other Liabilities [Member]
Derivative Instruments in Statement of Financial Position at Fair Value
Other liabilities	$ 0	$ 2.4