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COMPONENTS OF PENSION PLAN NET PERIODIC BENEFIT COSTS (Tables)
 9 Months Ended
Sep. 30, 2016
Pension Plan  
Employee Benefit Plans  
Components of net periodic benefit cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

    

Three Months Ended

 

Nine Months Ended

 

 

 

September 30, 

 

September 30, 

 

 

 

2016

    

2015

    

2016

    

2015

    

 

    (in thousands)

 

Service cost

 

$
524

 

$
618

 

$
1,720

 

$
1,855

 

Interest cost

 

 
1,118

 

 
1,074

 

 
3,381

 

 
3,222

 

Expected return on plan assets

 

 
(1,363)

 

 
(1,398)

 

 
(3,937)

 

 
(4,193)

 

Amortization of net loss (1)

 

 
787

 

 
839

 

 
2,365

 

 
2,516

 

Net periodic benefit cost

 

$
1,066

 

$
1,133

 

$
3,529

 

$
3,400

 

(1)

Amortization of net actuarial loss is included in the Operating expenses (excluding depreciation, depletion and amortization) line item within our condensed consolidated statements of income.