Accumulated Other Comprehensive Income (Loss) - Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of year	$ 563,260
Total other comprehensive income, net	7,115	$ 3,063
Balance at end of year	581,922
Cumulative Translation Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of year	(54,257)	(38,163)
Other comprehensive income (loss) before reclassifications	5,853	4,800
Amounts reclassified from AOCI	0	0
Total other comprehensive income, net	5,853	4,800
Reclassification of stranded effects of the Act		0
Balance at end of year	(48,404)	(33,363)
Unrealized (Loss) Gain on Derivatives [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of year	(214)	847
Other comprehensive income (loss) before reclassifications	1,336	(770)
Amounts reclassified from AOCI	(79)	(292)
Total other comprehensive income, net	1,257	(1,062)
Reclassification of stranded effects of the Act		112
Balance at end of year	1,043	(103)
Pension/OPEB Liability Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of year	(24,967)	(20,610)
Other comprehensive income (loss) before reclassifications	(489)	(570)
Amounts reclassified from AOCI	243	119
Total other comprehensive income, net	(246)	(451)
Reclassification of stranded effects of the Act		(1,018)
Balance at end of year	(25,213)	(22,079)
Attributable to Unconsolidated Affiliates [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of year	(354)	6,870
Other comprehensive income (loss) before reclassifications	47	(401)
Amounts reclassified from AOCI	0	0
Total other comprehensive income, net	47	(401)
Reclassification of stranded effects of the Act		1,462
Balance at end of year	(307)	7,931
Total [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of year	(79,792)	(51,056)
Other comprehensive income (loss) before reclassifications	6,747	3,059
Amounts reclassified from AOCI	164	(173)
Total other comprehensive income, net	6,911	2,886
Reclassification of stranded effects of the Act		556
Balance at end of year	$ (72,881)	$ (47,614)