EMPLOYEE BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Pension Plan [Member]
Summary of net periodic pension cost [Abstract]
Service cost	$ 0.5	$ 0.5	$ 0.9	$ 0.9
Interest cost	0.6	0.6	1.3	1.3
Expected return on plan assets	(0.8)	(0.7)	(1.5)	(1.3)
Amortization of actuarial loss	0.3	0.3	0.5	0.5
Net periodic benefit cost	0.6	0.7	1.2	1.4
Supplementary Pension Plan [Member]
Summary of net periodic pension cost [Abstract]
Service cost	0.1	0.1	0.2	0.2
Interest cost	0.2	0.1	0.3	0.2
Expected return on plan assets	0	0	0	0
Amortization of actuarial loss	0	0	0.1	0.1
Net periodic benefit cost	$ 0.3	$ 0.2	$ 0.6	$ 0.5