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Retirement Plans and Other Post-Retirement Benefits | 9 Months Ended
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Sep. 30, 2018
Compensation And Retirement Disclosure [Abstract] |
Retirement Plans and Other Post-Retirement Benefits |
11. | 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 included in continuing operations.
|  | Three months ended September 30
In thousands |  | 2018 |  |  |  | 2017 |  |
Pension Benefits |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 595 |  |  |  | $ | 487 |  |
Interest cost |  |  | 3,241 |  |  |  |  | 3,413 |  |
Expected return on plan assets |  |  | (5,531 | ) |  |  |  | (5,514 | ) |
Amortization of prior service cost |  |  | 5 |  |  |  |  | 7 |  |
Amortization of unrecognized loss |  |  | 2,060 |  |  |  |  | 1,777 |  |
Total net periodic benefit cost |  | $ | 370 |  |  |  | $ | 170 |  |
Other Benefits |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 16 |  |  |  | $ | 16 |  |
Interest cost |  |  | 80 |  |  |  |  | 91 |  |
Amortization of actuarial gain |  |  | (16 | ) |  |  |  | (4 | ) |
Total net periodicbenefit cost |  | $ | 80 |  |  |  | $ | 103 |  |
|  | Nine months ended September 30 |
In thousands |  | 2018 |  |  |  | 2017 |
Pension Benefits |  |  |  |  |  |  |  |  |
Service cost |  | $ | 1,784 |  |  |  | $ | 1,462 |
Interest cost |  |  | 9,723 |  |  |  |  | 10,240 |
Expected return on plan assets |  |  | (16,592 | ) |  |  |  | (16,542 | )
Amortization of prior service cost |  |  | 16 |  |  |  |  | 17 |
Amortization of unrecognized loss |  |  | 6,179 |  |  |  |  | 5,332 |
Total net periodic benefit cost |  | $ | 1,110 |  |  |  | $ | 509 |
Other Benefits |  |  |  |  |  |  |  |  |
Service cost |  | $ | 46 |  |  |  | $ | 49 |
Interest cost |  |  | 239 |  |  |  |  | 275 |
Amortization of actuarial gain |  |  | (49 | ) |  |  |  | (10 | )
Total net periodic benefit cost |  | $ | 236 |  |  |  | $ | 314 |
In the first quarter of 2018, we adopted the provisions of ASU No. 2017-07 which requires entities to present the service cost component of net periodic benefit costs in operating profit along with other employee compensation costs. All other components of net periodic benefit costs are to be presented below the determination of operating income in “Other, net”.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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