Other Comprehensive Income Components of Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax					$ 7,500,000
Net earnings	59,713,000	40,942,000	141,563,000	104,007,000
Currency Translation Adjustment	(13,167,000)	6,559,000	(9,737,000)	(1,406,000)
Pension liability adjustment, net of tax	33,000	(16,000)	(14,000)	224,000
Unrealized gain on interest rate swaps, net of tax	529,000	(362,000)	532,000	550,000
Comprehensive income	$ 47,108,000	$ 47,123,000	$ 132,372,000	$ 103,375,000