DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, fixed interest rate	2.92%
Variable interest rate related to interest rate swap agreement	three-month LIBOR
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%
Interest rate contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion of derivative gain	$ 0	$ 2.4