Accumulated Other Comprehensive Income (Loss) - Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			$ 563,260
Total other comprehensive (loss) income, net	$ (2,996)	$ (10,516)	4,119	$ (7,453)
Balance at end of period	604,362		604,362
Cumulative Translation Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(54,257)	(38,163)
Other comprehensive income before reclassifications			3,999	(6,793)
Amounts reclassified from AOCI			0	0
Total other comprehensive (loss) income, net			3,999	(6,793)
Reclassification of stranded effects of the Act				0
Balance at end of period	(50,258)	(44,956)	(50,258)	(44,956)
Unrealized (Loss) Gain on Derivatives [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(214)	847
Other comprehensive income before reclassifications			625	(752)
Amounts reclassified from AOCI			(297)	(275)
Total other comprehensive (loss) income, net			328	(1,027)
Reclassification of stranded effects of the Act				112
Balance at end of period	114	(68)	114	(68)
Pension/OPEB Liability Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(24,967)	(20,610)
Other comprehensive income before reclassifications			17	353
Amounts reclassified from AOCI			413	146
Total other comprehensive (loss) income, net			430	499
Reclassification of stranded effects of the Act				(1,018)
Balance at end of period	(24,537)	(21,129)	(24,537)	(21,129)
Attributable to Unconsolidated Affiliates [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(354)	6,870
Other comprehensive income before reclassifications			281	(280)
Amounts reclassified from AOCI			0	0
Total other comprehensive (loss) income, net			281	(280)
Reclassification of stranded effects of the Act				1,462
Balance at end of period	(73)	8,052	(73)	8,052
Total [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period	(72,881)	(47,614)	(79,792)	(51,056)
Other comprehensive income before reclassifications			4,922	(7,472)
Amounts reclassified from AOCI			116	(129)
Total other comprehensive (loss) income, net	(1,873)	(10,487)	5,038	(7,601)
Reclassification of stranded effects of the Act				556
Balance at end of period	$ (74,754)	$ (58,101)	$ (74,754)	$ (58,101)