SUBSEQUENT EVENT (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2013
Subsequent Event [Line Items]
Threshold amount for additional charges to accumulated comprehensive income related to pension assets	$ 16.7
Minimum [Member]
Subsequent Event [Line Items]
Salaries, net periodic pension costs and other employee benefits could be recorded	8.0
Pre-tax non cash acceleration of amortization of pension assets included in accumulated other comprehensive income	8.0
Maximum [Member]
Subsequent Event [Line Items]
Salaries, net periodic pension costs and other employee benefits could be recorded	16.0
Pre-tax non cash acceleration of amortization of pension assets included in accumulated other comprehensive income	$ 13.0