Other Comprehensive Income Components of Other Comprehensive Income (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Dec. 28, 2013
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax					$ 7,500,000
Net earnings	48,405,000	37,163,000	81,850,000	63,065,000
Currency Translation Adjustment	1,856,000	(3,281,000)	3,430,000	(7,965,000)
Pension liability adjustment, net of tax	38,000	74,000	19,000	240,000
Unrealized gain on interest rate swaps, net of tax	(261,000)	1,218,000	3,000	912,000
Comprehensive income	$ 50,038,000	$ 35,174,000	$ 85,264,000	$ 56,252,000