Other Comprehensive Income Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Net earnings	$ 48,825	$ 59,713	$ 141,323	$ 141,563
Currency Translation Adjustment	(13,564)	(13,167)	(22,686)	(9,737)
Pension liability adjustment, net of tax	17	33	(42)	14
Unrealized gain on interest rate swaps, net of tax	(201)	529	(371)	532
Comprehensive income	$ 35,077	$ 47,108	$ 118,308	$ 132,372