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Retirement and Benefit Plans
 6 Months Ended
Jun. 30, 2014
Retirement and Benefit Plans [Abstract]  
Retirement and Benefit Plans
Retirement and Benefit Plans
 
The following table presents the pension benefit costs:
 
 
Three Months Ended
June 30
 
Six Months Ended
June 30
 
2014
 
2013
 
2014
 
2013
 
(thousands)
Service cost
$
414

 
$
671

 
$
815

 
$
1,342

Interest cost
4,929

 
4,650

 
10,080

 
9,292

Expected return on plan assets
(5,258
)
 
(4,916
)
 
(10,526
)
 
(9,782
)
Amortization of actuarial (gain) loss
(6
)
 
2,281

 
(12
)
 
4,537

Amortization of prior service costs
—

 
22

 
—

 
45

Net periodic benefit cost
$
79

 
$
2,708

 
$
357

 
$
5,434


 
In the first six months of 2014, we contributed $0.8 million in cash to the pension plans. For the remainder of 2014, we expect to make approximately $11.5 million in contributions to the pension plans, which includes $10.8 million of cash contributed in July 2014.