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Employee Benefit Plans
 9 Months Ended
Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Employee Benefit Plans
Employee Benefit Plans
 
The components of net periodic benefit cost for the Company’s defined benefit and other postretirement plans included the following: 
 
 
Three months ended September 30,
 
Nine months ended September 30,
Components of Net Period Benefit Cost
 
2014
 
2013
 
2014
 
2013
 
 
(in thousands)
Service cost
 
$
3,162

 
$
4,473

 
$
9,066

 
$
11,676

Interest cost
 
6,839

 
6,340

 
20,811

 
18,939

Expected return on plan assets
 
(4,842
)
 
(4,065
)
 
(14,532
)
 
(12,196
)
Recognized net actuarial loss
 
49

 
2,280

 
499

 
6,381

Net periodic benefit cost
 
$
5,208

 
$
9,028

 
$
15,844

 
$
24,800


 
The Company made contributions of $2.3 million and $8.9 million to its defined benefit and other postretirement plans during the three and nine months ended September 30, 2014, respectively. The Company made contributions of $11.9 million and $18.6 million to its defined benefit and other postretirement plans during the three and nine months ended September 30, 2013, respectively.