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Pension Plans and Other Postretirement Benefits
 9 Months Ended
Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]  
Pension Plans and Other Postretirement Benefits
Pension Plans and Other Postretirement Benefits:
The following information is provided for domestic and foreign pension and postretirement defined benefit plans:
 
 
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
 
2013
 
2012
 
2013
 
2012
 
 
(In thousands)
Net Periodic Pension Benefit Cost (Credit):
 
 
 
 
 
 
 
 
Service cost
 
$
3,488

 
$
3,174

 
$
10,462

 
$
9,391

Interest cost
 
7,470

 
8,076

 
22,403

 
24,269

Expected return on assets
 
(9,848
)
 
(11,634
)
 
(29,541
)
 
(34,913
)
Actuarial gain(a)
 
—

 
—

 
—

 
(5,840
)
Amortization of prior service benefit
 
(173
)
 
(245
)
 
(517
)
 
(731
)
Total net periodic pension benefit cost (credit)
 
$
937

 
$
(629
)
 
$
2,807

 
$
(7,824
)
 
 
 
 
 
 
 
 
 
Net Periodic Postretirement Benefit Cost (Credit):
 
 
 
 
 
 
 
 
Service cost
 
$
78

 
$
69

 
$
232

 
$
206

Interest cost
 
691

 
793

 
2,073

 
2,379

Expected return on assets
 
(104
)
 
(122
)
 
(310
)
 
(366
)
Actuarial gain(a)
 
—

 
—

 
—

 
(4,439
)
Amortization of prior service benefit
 
(24
)
 
(25
)
 
(72
)
 
(73
)
Total net periodic postretirement benefit cost (credit)
 
$
641

 
$
715

 
$
1,923

 
$
(2,293
)
Total net periodic pension and postretirement benefit
 
 
 
 
 
 
 
 
cost (credit)
 
$
1,578

 
$
86

 
$
4,730

 
$
(10,117
)
 
(a)
In the second quarter of 2013, we identified that our consolidated statement of income for the nine-month period ended September 30, 2012 included a correction of $10.3 million for pension and OPEB plan actuarial gains that related to 2011. This amount was deemed to be not material with respect to our financial statements for the year ended December 31, 2012 and any prior period financial statements.
During the three-month and nine-month periods ended September 30, 2013, we made contributions of $4.8 million and $6.8 million, respectively, to our qualified and nonqualified pension plans. During the three-month and nine-month periods ended September 30, 2012, we made contributions of $0.3 million and $3.0 million, respectively, to our qualified and nonqualified pension plans, and we also made a contribution of $14.1 million to our SERP in connection with the retirement of our former CEO and executive chairman.
We paid $0.9 million and $3.1 million in premiums to the U.S. postretirement benefit plan during the three-month and nine-month periods ended September 30, 2013, respectively. Also, we paid $0.7 million and $2.6 million in premiums to the U.S. postretirement benefit plan during the three-month and nine-month periods ended September 30, 2012, respectively.