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Employee Benefit Plans (Details) $ in Thousands | 3 Months Ended
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Mar. 28, 2020 USD ($) plan | Mar. 30, 2019 USD ($)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |
Amount Company expects to contribute to its pension plans | $ 4,700 |
Payment for pension benefits | $ 800 | $ 900
Multiemployer Plans [Abstract] |  |
Number Of Multiemployer Plans, Withdrawal Obligation Could Be Material | plan | 2 |
Number Of Multiemployer Plans Withdrawal Obligation Could Be Material Certified Red Zone | plan | 1 |
Number of Multiemployer Plans, Certified Red Zone | plan | 5 |
Number of Multiemployer Plans, Certified Yellow Zone | plan | 2 |
Number Of Multiemployer Plans, Withdrawal Obligation | plan | 5 |
Accrued liability representing the present value of scheduled withdrawal liability payments for under-funded multi-employer plan | $ 5,500 |
Maximum [Member] |  |
Multiemployer Plans [Abstract] |  |
Multiemployer Plan, Contributions To Individual Plan, Percent | 5.00% |
Pension Plan, Defined Benefit [Member] |  |
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] |  |
Service cost | $ 755 | 678
Interest cost | 1,428 | 1,710
Expected return on plan assets | (2,039) | (1,819)
Amortization of prior service cost | 8 | 9
Amortization of net loss | 854 | 1,146
Net pension cost | $ 1,006 | $ 1,724

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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 + Details
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