XML 32 R13.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Retirement Plans and Other Post-Retirement Benefits | 6 Months Ended
--- | ---
Jun. 30, 2017
Compensation And Retirement Disclosure [Abstract] |
Retirement Plans and Other Post-Retirement Benefits |
7. | 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 June 30
In thousands |  | 2017 |  |  |  | 2016 |  |
Pension Benefits |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2,649 |  |  |  | $ | 2,510 |  |
Interest cost |  |  | 5,989 |  |  |  |  | 6,153 |  |
Expected return on plan assets |  |  | (10,666 | ) |  |  |  | (11,275 | ) |
Amortization of prior service cost |  |  | 708 |  |  |  |  | 675 |  |
Amortization of unrecognized loss |  |  | 3,311 |  |  |  |  | 3,533 |  |
Total net periodic benefit cost |  | $ | 1,991 |  |  |  | $ | 1,596 |  |
Other Benefits |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 284 |  |  |  | $ | 250 |  |
Interest cost |  |  | 513 |  |  |  |  | 456 |  |
Amortization of prior service credit |  |  | (46 | ) |  |  |  | (46 | ) |
Amortization of actuarial gain |  |  | (46 | ) |  |  |  | (327 | ) |
Total net periodic benefit cost |  | $ | 705 |  |  |  | $ | 333 |  |
|  | Six months ended June 30 |
In thousands |  | 2017 |  |  |  | 2016 |
Pension Benefits |  |  |  |  |  |  |  |  |
Service cost |  | $ | 5,370 |  |  |  | $ | 5,240 |
Interest cost |  |  | 11,896 |  |  |  |  | 12,240 |
Expected return on plan assets |  |  | (21,497 | ) |  |  |  | (22,661 | )
Amortization of prior service cost |  |  | 1,412 |  |  |  |  | 1,349 |
Amortization of unrecognized loss |  |  | 6,133 |  |  |  |  | 6,587 |
Total net periodic benefit cost |  | $ | 3,314 |  |  |  | $ | 2,755 |
Other Benefits |  |  |  |  |  |  |  |  |
Service cost |  | $ | 579 |  |  |  | $ | 573 |
Interest cost |  |  | 998 |  |  |  |  | 996 |
Amortization of prior service credit |  |  | (91 | ) |  |  |  | (91 | )
Amortization of actuarial gain |  |  | (189 | ) |  |  |  | (378 | )
Total net periodic benefit cost |  | $ | 1,297 |  |  |  | $ | 1,100 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration