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Pension And Other Postretirement Benefit Plans | 6 Months Ended
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Sep. 30, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] |
Pension and Other Postretirement Benefits Disclosure | PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS The Company sponsors several defined benefit pension plans covering U.S. salaried employees and certain foreign and other employee groups. These plans provide retirement benefits based primarily on employee compensation and years of service. The Company also sponsors defined benefits plans that provide postretirement health and life insurance benefits for eligible U.S. employees attaining specific age and service levels. The components of the Company’s net periodic benefit cost were as follows:
|  | Pension Benefits |  | Other Postretirement Benefits
|  | Three Months Ended September 30, |  | Three Months Ended September 30,
(in thousands of dollars) |  | 2013 |  | 2012 |  | 2013 |  | 2012
Service cost |  | $ | 1,197 |  |  | $ | 1,046 |  |  | $ | 131 |  |  | $ | 146 |
Interest cost |  | 2,865 |  |  | 3,153 |  |  | 508 |  |  | 569 |
Expected return on plan assets |  | (3,543 | ) |  | (3,197 | ) |  | (30 | ) |  | (31 | )
Settlement costs |  | — |  |  | 1,329 |  |  | — |  |  | — |
Net amortization and deferral |  | 2,447 |  |  | 2,846 |  |  | (17 | ) |  | 48 |
Net periodic benefit cost |  | $ | 2,966 |  |  | $ | 5,177 |  |  | $ | 592 |  |  | $ | 732 |
|  | Pension Benefits |  | Other Postretirement Benefits
|  | Six Months Ended September 30, |  | Six Months Ended September 30,
(in thousands of dollars) |  | 2013 |  | 2012 |  | 2013 |  | 2012
Service cost |  | $ | 2,392 |  |  | $ | 2,270 |  |  | $ | 269 |  |  | $ | 294 |
Interest cost |  | 5,722 |  |  | 6,319 |  |  | 1,040 |  |  | 1,145 |
Expected return on plan assets |  | (7,085 | ) |  | (6,694 | ) |  | (60 | ) |  | (62 | )
Settlement costs |  | — |  |  | 1,329 |  |  | — |  |  | — |
Net amortization and deferral |  | 4,894 |  |  | 5,364 |  |  | (34 | ) |  | 100 |
Net periodic benefit cost |  | $ | 5,923 |  |  | $ | 8,588 |  |  | $ | 1,215 |  |  | $ | 1,477 |
During the six months ended September 30, 2013, the Company made contributions of approximately $7.3 million to its pension plans. Additional contributions of approximately $5.7 million are expected during the remaining six months of fiscal year 2014, including $5.1 million to the Company's ERISA-regulated U.S. plan and $0.6 million to its non-ERISA regulated and other plans. During the quarter ended September 30, 2013, the Company amended its ERISA-regulated and non-regulated pension plans in the U.S. to change the benefit formula that will be applied to service periods beginning January 1, 2014, to modify early retirement benefit factors, and to cover on a prospective basis certain employees who did not previously participate in the plans. Due to the significance of the amendments on the benefit obligation for the plans, the Company remeasured the plan’s assets and liabilities during the quarter using actuarial assumptions that were updated as of the valuation date. The updated actuarial assumptions included an increase in the discount rate used to calculate the benefit liability, reflecting a general rise in market interest rates since March 31, 2013. The remeasurement resulted in a prior service credit of approximately $19 million. That item, together with other actuarial gains as of the remeasurement date, reduced the aggregate underfunded status of the Company’s pension plans by approximately $40 million, which was recorded through comprehensive income under the applicable accounting guidance. After the remeasurement, the projected benefit obligation (“PBO”) and the funded status of the Company’s defined benefit pension plans at September 30, 2013, compared to the March 31, 2013 fiscal year end, were as follows:
|  | Pension Benefits
(in thousands of dollars) |  | September 30, 2013 |  | March 31, 2013
Projected benefit obligation |  | $ | 260,689 |  |  | $ | 299,161 |
Funded status |  | (52,484 | ) |  | (93,219 | )
The effect of the plan amendments on net periodic benefit cost for the second half of the current fiscal year is not expected to be material to the Company's results of operations.

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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 + Details
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