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Benefit Plans
 3 Months Ended
Mar. 31, 2016
Compensation and Retirement Disclosure [Abstract]  
Benefit Plans
Benefit Plans

The following table provides the components of net periodic benefit cost for the pension, supplemental executive retirement and other postretirement benefit plans:
 
 
Three Months Ended March 31,
(In thousands)
 
Pension and Supplemental Executive Retirement Plans
 
Other Postretirement Benefits
 
 
2016
 
2015
 
2016
 
2015
Service cost
 
$
2,163

 
$
2,448

 
$
175

 
$
202

Interest cost
 
3,929

 
3,908

 
172

 
178

Expected return on plan assets
 
(4,889
)
 
(5,295
)
 
(1,222
)
 
(1,248
)
Recognized net actuarial loss (gain)
 
1,361

 
1,209

 
—

 
(35
)
Amortization of prior service cost
 
(172
)
 
(211
)
 
(1,662
)
 
(1,662
)
Net periodic benefit cost (benefit)
 
$
2,392

 
$
2,059

 
$
(2,537
)
 
$
(2,565
)
We currently intend to make a contribution of $11.4 million to our qualified pension plan and supplemental executive retirement plan in 2016.