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Pension Plans and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Pension Plans and Other Postretirement Benefits
Pension Plans and Other Postretirement Benefits

The following tables set forth information regarding the components of net periodic cost (benefit) for our defined benefit pension plans and other postretirement benefit plan for the periods indicated.
 
 
Pension Benefits
 
 
 
Other Postretirement
Benefits
 
 
For the Three Months Ended March 31,
 
For the Three Months Ended March 31,
(In Thousands)
 
2016
 
 
 
2015
 
 
 
2016
 
 
 
2015
 
Service cost
 
$
—

 
 
 
$
—

 
 
 
$
472

 
 
 
$
469

 
Interest cost
 
2,536

 
 
 
2,510

 
 
 
263

 
 
 
276

 
Expected return on plan assets
 
(3,058
)
 
 
 
(3,633
)
 
 
 
—

 
 
 
—

 
Recognized net actuarial loss (gain)
 
734

 
 
 
757

 
 
 
(67
)
 
 
 
—

 
Amortization of prior service cost
 
47

 
 
 
47

 
 
 
—

 
 
 
—

 
Net periodic cost (benefit)
 
$
259

 
 
 
$
(319
)
 
 
 
$
668

 
 
 
$
745