Accumulated Other Comprehensive Income (Loss) - Changes by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	$ 536,028
Total other comprehensive income, net	3,063	$ 5,564
Reclassification of stranded effects of the Act	556
Ending balance	553,065
Total [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	(51,056)	(66,956)
Other comprehensive income (loss) before reclassifications	3,059	4,312
Amounts reclassified from AOCI	(173)	603
Total other comprehensive income, net	2,886	4,915
Reclassification of stranded effects of the Act	556
Ending balance	(47,614)	(62,041)
Cumulative Translation Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	(38,163)	(49,965)
Other comprehensive income (loss) before reclassifications	4,800	6,561
Amounts reclassified from AOCI	0	0
Total other comprehensive income, net	4,800	6,561
Reclassification of stranded effects of the Act	0
Ending balance	(33,363)	(43,404)
Unrealized (Loss) Gain on Derivatives [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	847	(300)
Other comprehensive income (loss) before reclassifications	(770)	(445)
Amounts reclassified from AOCI	(292)	501
Total other comprehensive income, net	(1,062)	56
Reclassification of stranded effects of the Act	112
Ending balance	(103)	(244)
Pension/OPEB Liability Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	(20,610)	(23,046)
Other comprehensive income (loss) before reclassifications	(570)	(222)
Amounts reclassified from AOCI	119	262
Total other comprehensive income, net	(451)	40
Reclassification of stranded effects of the Act	(1,018)
Ending balance	(22,079)	(23,006)
Unrealized Gain (Loss) on Equity Securities [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	0	380
Other comprehensive income (loss) before reclassifications	0	16
Amounts reclassified from AOCI	0	(160)
Total other comprehensive income, net	0	(144)
Reclassification of stranded effects of the Act	0
Ending balance	0	236
Attributable to Unconsolidated Affiliates [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	6,870	5,975
Other comprehensive income (loss) before reclassifications	(401)	(1,598)
Amounts reclassified from AOCI	0	0
Total other comprehensive income, net	(401)	(1,598)
Reclassification of stranded effects of the Act	1,462
Ending balance	$ 7,931	$ 4,377