Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Disclosure Other Comprehensive Income Additional Information [Abstract]
Net earnings	$ 60,516	$ 82,020	$ 155,457	$ 243,243
Currency Translation Adjustment	25,851	(25,428)	(3,213)	(27,190)
Change in unrecognized pension benefit costs, net of tax	(6,133)	4,975	6,184	4,966
Unrealized gain on interest rate swaps, net of tax	2,653	(5,652)	(25,227)	(29,143)
Comprehensive income	$ 82,887	$ 55,915	$ 133,201	$ 191,876