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Pension and Other Postretirement Benefits | 6 Months Ended
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Jun. 30, 2017
Pension and Other Postretirement Benefits |
Pension and Other Postretirement Benefits | 8. Pension and Other Postretirement Benefits Components of net periodic benefit cost were as follows:
|  | Pension Benefits |  | Postretirement Benefits |
|  | Three months ended June 30, |
(in thousands) |  | 2017 |  | 2016 |  | 2017 |  | 2016 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 2,184 |  | $ | 2,456 |  | $ | 243 |  | $ | 250 |
Interest cost |  |  | 2,934 |  |  | 3,122 |  |  | 183 |  |  | 212 |
Expected return on plan assets |  |  | (2,934) |  |  | (3,067) |  |  | - |  |  | - |
Settlement expense |  |  | 185 |  |  | - |  |  | - |  |  | - |
Amortization of net (gain) loss |  |  | 258 |  |  | 122 |  |  | (135) |  |  | (174) |
Amortization of prior service cost (credit) |  |  | 43 |  |  | 43 |  |  | (27) |  |  | (42) |
Net periodic benefit cost |  | $ | 2,670 |  | $ | 2,676 |  | $ | 264 |  | $ | 246 |
|  | Pension Benefits |  | Postretirement Benefits |
|  | Six months ended June 30, |
(in thousands) |  | 2017 |  | 2016 |  | 2017 |  | 2016 |
Components of net periodic benefit cost |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 4,521 |  | $ | 4,909 |  | $ | 478 |  | $ | 500 |
Interest cost |  |  | 5,952 |  |  | 6,293 |  |  | 357 |  |  | 423 |
Expected return on plan assets |  |  | (5,947) |  |  | (6,206) |  |  | - |  |  | - |
Settlement expense |  |  | 316 |  |  | - |  |  | - |  |  | - |
Amortization of net (gain) loss |  |  | 297 |  |  | 247 |  |  | (301) |  |  | (348) |
Amortization of prior service cost (credit) |  |  | 87 |  |  | 87 |  |  | (68) |  |  | (84) |
Net periodic benefit cost |  | $ | 5,226 |  | $ | 5,330 |  | $ | 466 |  | $ | 491 |

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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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