BENEFIT PLANS: (Tables)

9 Months Ended

Sep. 30, 2014

Post retirement defined benefit plan

Components of net periodic benefit costs

Schedule of the components of net periodic benefit costs

The components of the net periodic benefit cost for the nine months ended September 30, 2014 and 2013 are as follows (in millions):

	2014			2013
Interest cost	$	1.0		$	1.2
Amortization of net loss (gain)	(0.2		)	—
Amortization of prior service cost (credit)	—			—
Net periodic benefit cost	$	0.8		$	1.2

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 benefit costs for the nine months ended September 30, 2014 and 2013 are as follows (in millions):

	2014			2013
Service cost	$	0.9		$	1.0
Interest cost	0.9			0.8
Expected return on plan assets	(2.7		)	(2.5		)
Amortization of net actuarial loss	(0.2		)	(0.6		)
Amortization of net loss (gain)	0.1			0.1
Net periodic benefit cost	$	(1.0	)	$	(1.2	)