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BENEFIT PLANS: (Tables)
 3 Months Ended
Mar. 31, 2015
Post retirement defined benefit plan  
Components of net periodic benefit costs  
Schedule of the components of net periodic benefit costs

 

The components of net periodic benefit costs for the three months ended March 31, 2015 and 2014 are as follows (in millions):

 

 

 

2015

 

2014

 

Service cost

 

$
0.2

 

$
0.3

 

Interest cost

 
0.2

 
0.3

 

Expected return on plan assets

 
(0.7

)
(0.9

)

Amortization of net actuarial loss

 

(*

)
(0.2

)

Amortization of net loss/(gain)

 

(*

)

(*)

 

Net periodic benefit costs

 

$
(0.3

)

$
(0.5

)

 

 

(*) amount is lower than $0.1 million

Post-retirement Health Care Plan  
Components of net periodic benefit costs  
Schedule of the components of net periodic benefit costs

 

The components of net periodic benefit cost for the three months ended March 31, 2015 and 2014 are as follows (in millions):

 

 

 

2015

 

2014

 

Interest cost

 

$
0.3

 

$
0.3

 

Amortization of net loss (gain)

 
(0.1

)

(*)

 

Amortization of prior service cost (credit)

 

(*)

 

(*)

 

Net periodic benefit cost

 

$
0.2

 

$
0.3

 

 

 

(*) amount is lower than $0.1 million