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Benefit Plans - Benefit Plan Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Change in fair value of plan assets: |  |  |
Beginning balance | $ 186,336 |  |
Ending balance | 164,603 | $ 186,336 |
Actuarial net loss | 1,800 |  |
Prior service credit | $ (900) |  |
Payable maximum period to be considered current | 12 months |  |
Funded status of the plans recognized [Abstract] |  |  |
Long-term liability | $ (14,237) | (11,606) |
Components of net periodic benefit cost [Abstract] |  |  |
Net periodic benefit (income) cost | $ (2,914) | (1,150) | $ 1,687
Weighted average assumptions in net periodic benefit calculations [Abstract] |  |  |
Ultimate health care cost trend rate | 3.00% |  |
Minimum [Member] |  |  |
Weighted average assumptions in net periodic benefit calculations [Abstract] |  |  |
Annual assumed rate of increase in the per capita cost of covered benefits | 6.40% |  |
Maximum [Member] |  |  |
Weighted average assumptions in net periodic benefit calculations [Abstract] |  |  |
Annual assumed rate of increase in the per capita cost of covered benefits | 8.40% |  |
Pension Plan [Member] |  |  |
Change in benefit obligation [Roll Forward] |  |  |
Obligation at beginning of year | $ 186,766 | 178,736 |
Service cost | 88 | 128 | 532
Interest cost | 5,745 | 6,344 | 7,553
Actuarial (gain) loss | (10,637) | 4,688 |
Benefit payments | (10,368) | (10,171) |
Settlement charge | 0 | 0 |
Foreign currency translation adjustment | (4,855) | 7,041 |
Obligation at end of year | 166,739 | 186,766 | 178,736
Change in fair value of plan assets: |  |  |
Beginning balance | 186,336 | 169,140 |
Actual return on plan assets | (8,282) | 19,175 |
Employer contributions | 999 | 2,271 |
Benefit payments | (10,368) | (10,171) |
Foreign currency translation adjustment | (4,082) | 5,921 |
Ending balance | 164,603 | 186,336 | 169,140
Underfunded status at end of year | (2,136) | (430) |
Unrecognized net actuarial loss | 39,101 | 34,627 |
Unrecognized prior service credit | 0 | 0 |
Funded status of the plans recognized [Abstract] |  |  |
Long-term asset | 10,580 | 9,894 |
Current liability | 0 | 0 |
Long-term liability | (12,716) | (10,324) |
Total underfunded status | (2,136) | (430) |
Components of net periodic benefit cost [Abstract] |  |  |
Service cost | 88 | 128 | 532
Interest cost | 5,745 | 6,344 | 7,553
Expected return on plan assets | (9,522) | (9,374) | (9,615)
Amortization of net loss (gain) | 1,151 | 2,206 | 2,898
Settlement charge | 0 | 0 | 1,214
Net periodic benefit (income) cost | $ (2,538) | $ (696) | $ 2,582
Weighted average assumptions in benefit obligations calculations [Abstract] |  |  |
Discount rate | 3.72% | 3.22% |
Expected long-term return on plan assets | 5.05% | 5.27% |
Rate of inflation | 3.40% | 3.30% |
Weighted average assumptions in net periodic benefit calculations [Abstract] |  |  |
Discount rate | 3.22% | 3.61% | 4.02%
Expected long-term return on plan assets | 5.27% | 5.56% | 5.59%
Rate of inflation | 3.30% | 3.30% | 3.20%
Other Postretirement Benefits Plan [Member] |  |  |
Change in benefit obligation [Roll Forward] |  |  |
Obligation at beginning of year | $ 16,407 | $ 15,274 |
Service cost | 235 | 235 | $ 232
Interest cost | 447 | 599 | 594
Actuarial (gain) loss | (1,185) | 923 |
Benefit payments | (892) | (883) |
Settlement charge | (171) | (209) |
Foreign currency translation adjustment | (459) | 468 |
Obligation at end of year | 14,382 | 16,407 | 15,274
Change in fair value of plan assets: |  |  |
Beginning balance | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Employer contributions | 892 | 883 |
Benefit payments | (892) | (883) |
Foreign currency translation adjustment | 0 | 0 |
Ending balance | 0 | 0 | 0
Underfunded status at end of year | (14,382) | (16,407) |
Unrecognized net actuarial loss | 170 | 1,540 |
Unrecognized prior service credit | (6,387) | (7,289) |
Funded status of the plans recognized [Abstract] |  |  |
Long-term asset | 0 | 0 |
Current liability | (1,080) | (1,070) |
Long-term liability | (13,302) | (15,337) |
Total underfunded status | (14,382) | (16,407) |
Components of net periodic benefit cost [Abstract] |  |  |
Service cost | 235 | 235 | 232
Interest cost | 447 | 599 | 594
Amortization of net loss (gain) | 92 | (42) | (60)
Amortization of prior service credit | (902) | (901) | (896)
Settlement charge | 38 | 17 | 0
Net periodic benefit (income) cost | $ (90) | $ (92) | $ (130)
Weighted average assumptions in benefit obligations calculations [Abstract] |  |  |
Discount rate | 4.56% | 3.89% |
Rate of compensation increases | 5.00% | 5.00% |
Weighted average assumptions in net periodic benefit calculations [Abstract] |  |  |
Discount rate | 3.89% | 4.21% | 4.25%
Rate of compensation increases | 5.00% | 5.00% | 5.00%
United Kingdom [Member] | Pension Plan [Member] |  |  |
Change in fair value of plan assets: |  |  |
Percent of above benefit obligation on company sponsored UK pension plan | 45.00% | 44.00% |
Percent above plan assets on company sponsored UK pension plan | 37.00% | 39.00% |

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