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Benefit Plans (Tables) | 3 Months Ended
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Apr. 01, 2018
Compensation And Retirement Disclosure [Abstract] |
Components of Net Periodic Pension Cost | The components of net periodic pension cost were as follows:
|  | First Quarter |
(in thousands) |  | 2018 |  |  | 2017 |
Service cost |  | $ | 1,412 |  |  | $ | 150 |
Interest cost |  |  | 2,856 |  |  |  | 2,979 |
Expected return on plan assets |  |  | (3,852 | ) |  |  | (3,399 | )
Recognized net actuarial loss |  |  | 933 |  |  |  | 807 |
Amortization of prior service cost |  |  | 6 |  |  |  | 7 |
Net periodic pension cost |  | $ | 1,355 |  |  | $ | 544 |
Components of Net Periodic Postretirement Benefit Cost | The components of net periodic postretirement benefit cost were as follows:
|  | First Quarter |
(in thousands) |  | 2018 |  |  | 2017 |
Service cost |  | $ | 502 |  |  | $ | 572 |
Interest cost |  |  | 696 |  |  |  | 911 |
Recognized net actuarial loss |  |  | 499 |  |  |  | 648 |
Amortization of prior service cost |  |  | (462 | ) |  |  | (746 | )
Net periodic postretirement benefit cost |  | $ | 1,235 |  |  | $ | 1,385 |

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- Definition Tabular disclosure of the components of net benefit costs for postretirement benefit plan including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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