Accumulated Other Comprehensive Income (Loss) - Changes in AOCI by Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			$ 801,060
Total other comprehensive (loss) income, net	$ (4,977)	$ 9,640	1,298	$ (12,601)
Balance at end of period	1,126,232		1,126,232
Total
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period	(48,262)	(89,799)	(54,883)	(68,770)
Other comprehensive income (loss) before reclassifications			3,738	(18,368)
Amounts reclassified from AOCI			(1,010)	6,027
Total other comprehensive (loss) income, net	(3,893)	8,688	2,728	(12,341)
Balance at end of period	(52,155)	(81,111)	(52,155)	(81,111)
Cumulative Translation Adjustment
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(37,339)	(46,198)
Other comprehensive income (loss) before reclassifications			763	(11,254)
Amounts reclassified from AOCI			0	0
Total other comprehensive (loss) income, net			763	(11,254)
Balance at end of period	(36,576)	(57,452)	(36,576)	(57,452)
Unrealized Gain (Loss) on Derivatives
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			984	476
Other comprehensive income (loss) before reclassifications			862	(5,082)
Amounts reclassified from AOCI			(1,584)	5,274
Total other comprehensive (loss) income, net			(722)	192
Balance at end of period	262	668	262	668
Pension/OPEB Liability Adjustment
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(17,203)	(21,855)
Other comprehensive income (loss) before reclassifications			(98)	(1,468)
Amounts reclassified from AOCI			574	753
Total other comprehensive (loss) income, net			476	(715)
Balance at end of period	(16,727)	(22,570)	(16,727)	(22,570)
Attributable to Unconsol. Affiliates
Changes in accumulated other comprehensive income [Roll Forward]
Balance at beginning of period			(1,325)	(1,193)
Other comprehensive income (loss) before reclassifications			2,211	(564)
Amounts reclassified from AOCI			0	0
Total other comprehensive (loss) income, net			2,211	(564)
Balance at end of period	$ 886	$ (1,757)	$ 886	$ (1,757)