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Retirement Plans and Other Post-Retirement Benefits | 9 Months Ended
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Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract] |
Retirement Plans and Other Post-Retirement Benefits |
9. | RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS
The following tables provide information with respect to the net periodic costs of our pension and post retirement medical benefit plans.
|  | Three months ended September 30 |
In thousands |  | 2014 |  |  | 2013 |
Pension Benefits |  |  |  |  |  |  |  |
Service cost |  | $ | 2,602 |  |  | $ | 2,897 |
Interest cost |  |  | 6,216 |  |  |  | 5,504 |
Expected return on plan assets |  |  | (10,969 | ) |  |  | (10,857 | )
Amortization of prior service cost |  |  | 827 |  |  |  | 773 |
Amortization of unrecognized loss |  |  | 2,977 |  |  |  | 5,237 |
Net periodic benefit cost |  | $ | 1,653 |  |  | $ | 3,554 |
Other Benefits |  |  |  |  |  |  |  |
Service cost |  | $ | 614 |  |  | $ | 789 |
Interest cost |  |  | 597 |  |  |  | 545 |
Amortization of prior service cost |  |  | (72 | ) |  |  | (125 | )
Amortization of unrecognized loss |  |  | 129 |  |  |  | 202 |
Net periodic benefit cost |  | $ | 1,268 |  |  | $ | 1,411 |
|  | Nine months ended September 30 |
In thousands |  | 2014 |  |  | 2013 |
Pension Benefits |  |  |  |  |  |  |  |
Service cost |  | $ | 7,810 |  |  | $ | 8,693 |
Interest cost |  |  | 18,696 |  |  |  | 16,504 |
Expected return on plan assets |  |  | (32,907 | ) |  |  | (32,570 | )
Amortization of prior service cost |  |  | 2,482 |  |  |  | 2,321 |
Amortization of unrecognized loss |  |  | 8,931 |  |  |  | 15,711 |
Net periodic benefit cost |  | $ | 5,012 |  |  | $ | 10,659 |
Other Benefits |  |  |  |  |  |  |  |
Service cost |  | $ | 1,844 |  |  | $ | 2,367 |
Interest cost |  |  | 1,793 |  |  |  | 1,635 |
Amortization of prior service cost |  |  | (216 | ) |  |  | (375 | )
Amortization of unrecognized loss |  |  | 387 |  |  |  | 606 |
Net periodic benefit cost |  | $ | 3,808 |  |  | $ | 4,233 |

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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 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 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=35743120&loc=d3e2410-114920 Reference 3: 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=35742057&loc=SL14450702-114947 Reference 4: 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=6414199&loc=d3e39622-114963 Reference 5: 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 + Details
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