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Pension And Other Postretirement Benefit Plans | 9 Months Ended
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Dec. 31, 2016
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 benefit 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 December 31, |  | Three Months Ended December 31,
(in thousands of dollars) |  | 2016 |  | 2015 |  | 2016 |  | 2015
Service cost |  | $ | 1,343 |  |  | $ | 1,469 |  |  | $ | 73 |  |  | $ | 106 |
Interest cost |  | 2,453 |  |  | 2,345 |  |  | 378 |  |  | 387 |
Expected return on plan assets |  | (3,584 | ) |  | (3,574 | ) |  | (11 | ) |  | (15 | )
Net amortization and deferral |  | 843 |  |  | 1,201 |  |  | (100 | ) |  | (44 | )
Net periodic benefit cost |  | $ | 1,055 |  |  | $ | 1,441 |  |  | $ | 340 |  |  | $ | 434 |
|  | Pension Benefits |  | Other Postretirement Benefits
|  | Nine Months Ended December 31, |  | Nine Months Ended December 31,
(in thousands of dollars) |  | 2016 |  | 2015 |  | 2016 |  | 2015
Service cost |  | $ | 4,063 |  |  | $ | 4,431 |  |  | $ | 220 |  |  | $ | 320 |
Interest cost |  | 7,389 |  |  | 7,038 |  |  | 1,136 |  |  | 1,186 |
Expected return on plan assets |  | (10,762 | ) |  | (10,727 | ) |  | (33 | ) |  | (45 | )
Net amortization and deferral |  | 2,519 |  |  | 3,599 |  |  | (300 | ) |  | (132 | )
Net periodic benefit cost |  | $ | 3,209 |  |  | $ | 4,341 |  |  | $ | 1,023 |  |  | $ | 1,329 |
The net periodic benefit cost for the Company's pension and other postretirement benefit plans has declined from the prior fiscal year, primarily reflecting actuarial gains from higher market discount rates applicable to the most recent actuarial measurement of benefit liabilities. During the nine months ended December 31, 2016, the Company made contributions of approximately $10.4 million to its pension plans. Additional contributions of approximately $0.6 million are expected during the remaining three months of fiscal year 2017.

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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 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2410-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39675-114964 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66047640&loc=d3e39622-114963 + Details
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