Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, balance at the beginning of the period			$ (146,726)
Other comprehensive income (loss)	$ 1,525	$ (8,543)	(8,678)	$ (48,111)
Accumulated other comprehensive loss, balance at the end of the period	(155,404)		(155,404)
Currency Translation Adjustment
Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, balance at the beginning of the period			(103,570)
Other comprehensive income (loss)			(12,954)
Accumulated other comprehensive loss, balance at the end of the period	(116,524)		(116,524)
Unrealized Gain (Loss) on Retirement Plans
Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, balance at the beginning of the period			(40,946)
Other comprehensive income (loss)			607
Accumulated other comprehensive loss, balance at the end of the period	(40,339)		(40,339)
Unrealized Gain (Loss) on Investments
Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss, balance at the beginning of the period			(2,210)
Other comprehensive income (loss)			3,669
Accumulated other comprehensive loss, balance at the end of the period	$ 1,459		$ 1,459