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Accumulated Other Comprehensive Income (Loss) - Changes in AOCI by Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Jun. 27, 2020 | Jun. 29, 2019
Changes in accumulated other comprehensive income [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | $ 662,136 |
Total other comprehensive (loss) income, net | $ (255) | $ (2,996) | (22,241) | $ 4,119
Balance at end of period | 690,204 |  | 690,204 |
Cumulative Translation Adjustment [Member] |  |  |  |
Changes in accumulated other comprehensive income [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (46,198) | (54,257)
Other comprehensive loss before reclassifications |  |  | (19,622) | 3,999
Amounts reclassified from AOCI |  |  | 0 | 0
Total other comprehensive (loss) income, net |  |  | (19,622) | 3,999
Balance at end of period | (65,820) | (50,258) | (65,820) | (50,258)
Unrealized (Loss) Gain on Derivatives [Member] |  |  |  |
Changes in accumulated other comprehensive income [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 476 | (214)
Other comprehensive loss before reclassifications |  |  | (5,413) | 625
Amounts reclassified from AOCI |  |  | 5,454 | (297)
Total other comprehensive (loss) income, net |  |  | 41 | 328
Balance at end of period | 517 | 114 | 517 | 114
Pension/OPEB Liability Adjustment [Member] |  |  |  |
Changes in accumulated other comprehensive income [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (21,855) | (24,967)
Other comprehensive loss before reclassifications |  |  | (1,034) | 17
Amounts reclassified from AOCI |  |  | 489 | 413
Total other comprehensive (loss) income, net |  |  | (545) | 430
Balance at end of period | (22,400) | (24,537) | (22,400) | (24,537)
Attributable to Unconsolidated Affiliates [Member] |  |  |  |
Changes in accumulated other comprehensive income [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (1,193) | (354)
Other comprehensive loss before reclassifications |  |  | (903) | 281
Amounts reclassified from AOCI |  |  | 0 | 0
Total other comprehensive (loss) income, net |  |  | (903) | 281
Balance at end of period | (2,096) | (73) | (2,096) | (73)
Total [Member] |  |  |  |
Changes in accumulated other comprehensive income [Roll Forward] |  |  |  |
Balance at beginning of period | (90,165) | (72,881) | (68,770) | (79,792)
Other comprehensive loss before reclassifications |  |  | (26,972) | 4,922
Amounts reclassified from AOCI |  |  | 5,943 | 116
Total other comprehensive (loss) income, net | 366 | (1,873) | (21,029) | 5,038
Balance at end of period | $ (89,799) | $ (74,754) | $ (89,799) | $ (74,754)

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121640130&loc=d3e1436-108581 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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