BENEFIT PLANS: (Tables)

9 Months Ended

Sep. 30, 2013

Post retirement defined benefit plans

Components of net periodic benefit costs

Schedule of the components of net periodic benefit costs

The components of the net periodic benefit costs for the nine months ended September 30, 2013 and 2012 are as follows (in millions):

	2013			2012
Interest cost	$	0.8		$	0.9
Service cost	1.0			0.7
Expected return on plan assets	(2.5		)	(2.7		)
Amortization of net loss	0.1			0.1
Amortization of net actuarial loss	(0.6		)	(0.6		)
Net periodic benefit cost	$	(1.2	)	$	(1.6	)

Post-retirement health care plan

Components of net periodic benefit costs

Schedule of the components of net periodic benefit costs

The components of the net periodic cost for the nine months ended September 30, 2013 and 2012 are as follows (in millions):

	2013		2012
Interest cost	$	1.2	$	1.1
Amortization of net loss (gain)	—		(0.2		)
Amortization of prior service cost (credit)	—		—
Net periodic benefit cost	$	1.2	$	0.9