CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (loss)
Balance, Beginning at Dec. 29, 2018	$ 1,665,203	$ 145	$ 377,419	$ (445,118)	$ 2,009,233	$ (276,476)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	69,013	0	0	0	69,013	0
Currency translation adjustment	10,683	0	0	0	0	10,683
Change in unrecognized pension benefit costs, net of tax	(5,263)	0	0	0	0	(5,263)
Unrealized gain on interest rate swaps, net of tax	(9,367)	0	0	0	0
Unrealized gain on interest rate swaps, net of tax | Accounting Standards Update 2017-12	(9,378)					(9,378)
Stock compensation	1,069	0	1,069	0	0	0
Purchase of treasury stock	(5,268)	0	0	(5,268)	0	0
Balance, Ending at Mar. 30, 2019	1,726,059	145	378,488	(450,386)	2,078,235	(280,423)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASU 2017-12 (1)	(100)
Adoption of ASU 2017-12 (1) | Accounting Standards Update 2017-12	0	0	0	0	(11)	11
Balance, Beginning at Dec. 28, 2019	1,946,814	145	387,402	(451,262)	2,361,462	(350,933)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	73,779	0	0	0	73,779	0
Currency translation adjustment	(48,916)	0	0	0	0	(48,916)
Change in unrecognized pension benefit costs, net of tax	14,808	0	0	0	0	14,808
Unrealized gain on interest rate swaps, net of tax	(25,219)	0	0	0	0	(25,219)
Stock compensation	4,159	0	4,159	0	0	0
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	3,881	0	3,881	0	0	0
Purchase of treasury stock	(74,600)	0	0	(74,600)	0	0
Balance, Ending at Mar. 28, 2020	$ 1,894,706	$ 145	$ 395,442	$ (525,862)	$ 2,435,241	$ (410,260)