Other Comprehensive Income Changes in accumulated other comprehensive income (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Tax, Portion Attributable to Parent, Held-to-maturity Securities	$ (38,500)
Currency Translation Adjustment	10,835	$ (396)
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(284,323)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	9,330
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2,527	(3,778)
Reclassification from accumulated other comprehensive income, current period, net of tax	(522)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	8,808
Accumulated Other Comprehensive Income (Loss), Net of Tax	(275,515)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Currency Translation Adjustment	10,835
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(116,411)
Reclassification from accumulated other comprehensive income, current period, net of tax	0
Other Comprehensive Income (Loss), before Reclassifications, before Tax	10,835
Accumulated Other Comprehensive Income (Loss), Net of Tax	(105,576)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(173,394)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2,527
Reclassification from accumulated other comprehensive income, current period, net of tax	0
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(2,527)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(175,921)
Interest Rate Swap [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	5,482
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	1,022
Reclassification from accumulated other comprehensive income, current period, net of tax	(522)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	500
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 5,982
Lynx [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Business Combination, Provisional Information Adjustment, Working Capital		$ 4,000