Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jun. 27, 2015	Jul. 02, 2016	Jun. 27, 2015
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance			$ 827,285
Other comprehensive income (loss) before reclassifications			(4,111)	$ (2,891)
Amounts reclassified from AOCI			(371)	1,619
Total other comprehensive (loss) income			(4,482)	(1,272)
Ending balance	$ 872,655		872,655
Reclassification adjustments out of AOCI [Abstract]
Cost of goods sold	(456,060)	$ (470,365)	(902,702)	(931,199)
Selling, general, and administrative expense	(34,514)	(33,420)	(70,294)	(66,251)
Interest expense	(1,692)	(2,219)	(3,540)	(4,295)
Income tax benefit (expense)	(14,005)	(19,738)	(28,126)	(31,151)
Net of tax	27,797	33,651	56,427	55,629
Noncontrolling interests	(462)	(211)	(497)	(573)
Consolidated net income	28,259	33,862	56,924	56,202
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance			(54,990)	(42,923)
Ending balance	(59,472)	(44,195)	(59,472)	(44,195)
Cumulative Translation Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance			(24,773)	(7,076)
Other comprehensive income (loss) before reclassifications			(9,939)	(947)
Amounts reclassified from AOCI			0	0
Total other comprehensive (loss) income			(9,939)	(947)
Ending balance	(34,712)	(8,023)	(34,712)	(8,023)
Unrealized (Losses)/Gains on Derivatives [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance			(2,009)	(953)
Other comprehensive income (loss) before reclassifications			2,457	(1,722)
Amounts reclassified from AOCI			(1,163)	621
Total other comprehensive (loss) income			1,294	(1,101)
Ending balance	(715)	(2,054)	(715)	(2,054)
Unrealized (Losses)/Gains on Derivatives [Member] | Amount Reclassified from AOCI [Member]
Reclassification adjustments out of AOCI [Abstract]
Cost of goods sold	(2,108)	(111)	(1,871)	651
Interest expense	92	98	200	204
Income tax benefit (expense)	716	(5)	508	(234)
Net of tax	(1,300)	(18)	(1,163)	621
Noncontrolling interests	0	0	0	0
Consolidated net income	(1,300)	(18)	(1,163)	621
Minimum Pension/OPEB Liability Adjustment [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance			(28,429)	(35,164)
Other comprehensive income (loss) before reclassifications			1,910	(229)
Amounts reclassified from AOCI			792	998
Total other comprehensive (loss) income			2,702	769
Ending balance	(25,727)	(34,395)	(25,727)	(34,395)
Minimum Pension/OPEB Liability Adjustment [Member] | Amount Reclassified from AOCI [Member]
Reclassification adjustments out of AOCI [Abstract]
Selling, general, and administrative expense	502	641	1,054	1,360
Income tax benefit (expense)	(122)	(164)	(262)	(362)
Net of tax	380	477	792	998
Noncontrolling interests	0	0	0	0
Consolidated net income	380	477	792	998
Other [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance			221	270
Other comprehensive income (loss) before reclassifications			1,461	7
Amounts reclassified from AOCI			0	0
Total other comprehensive (loss) income			1,461	7
Ending balance	$ 1,682	$ 277	$ 1,682	$ 277