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Pension Plans and Other Postretirement Benefits | 9 Months Ended
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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.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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