CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjustment	Paid-in Capital	Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	[1]	Accumulated Other Comprehensive Income (loss)	Accumulated Other Comprehensive Income (loss) Cumulative Effect, Period of Adoption, Adjustment	[1]
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. 29, 2018	$ 1,665,203		$ 145		$ 377,419		$ (445,118)		$ 2,009,233			$ (276,476)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	243,243		0		0		0		243,243			0
Currency translation adjustment	(27,190)		0		0		0		0			(27,190)
Change in unrecognized pension benefit costs, net of tax	4,966		0		0		0		0			4,966
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	955
Unrealized gain on interest rate swaps, net of tax	(29,143)
Unrealized gain on interest rate swaps, net of tax | Accounting Standards Update 2017-12	(29,154)		0		0		0		0			(29,154)
Unrealized (loss) gain on interest rate swap, tax	(9,890)
Stock compensation	3,257		0		3,257		0		0			0
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	1,850		0		1,850		0		0			0
Purchase of treasury stock	(6,144)		0		0		(6,144)		0			0
Balance, Ending at Sep. 28, 2019	1,856,031		145		382,526		(451,262)		2,252,465			(327,843)
Balance, Beginning at Jun. 29, 2019	1,798,251		145		380,603		(451,204)		2,170,445			(301,738)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	82,020		0		0		0		82,020			0
Currency translation adjustment	(25,428)		0		0		0		0			(25,428)
Change in unrecognized pension benefit costs, net of tax	4,975		0		0		0		0			4,975
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	1,026
Unrealized gain on interest rate swaps, net of tax	(5,652)		0		0		0		0			(5,652)
Unrealized (loss) gain on interest rate swap, tax	(1,867)
Stock compensation	1,923		0		1,923		0		0			0
Purchase of treasury stock	(58)		0		0		(58)		0			0
Balance, Ending at Sep. 28, 2019	1,856,031		145		382,526		(451,262)		2,252,465			(327,843)
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	155,457		0		0		0		155,457			0
Currency translation adjustment	(3,213)		0		0		0		0			(3,213)
Change in unrecognized pension benefit costs, net of tax	6,184		0		0		0		0			6,184
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	1,308
Unrealized gain on interest rate swaps, net of tax	(25,227)		0		0		0		0			(25,227)
Unrealized (loss) gain on interest rate swap, tax	(9,303)
Stock compensation	14,422		0		14,422		0		0			0
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	13,822		1		13,821		0		0			0
Purchase of treasury stock	(77,244)		0		0		(77,244)		0			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	307		0		307		0		0			0
Balance, Ending at Sep. 26, 2020	2,031,322		146		415,952		(528,506)		2,516,919			(373,189)
Balance, Beginning at Jun. 27, 2020	1,939,517		145		406,640		(528,111)		2,456,403			(395,560)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	60,516		0		0		0		60,516			0
Currency translation adjustment	25,851		0		0		0		0			25,851
Change in unrecognized pension benefit costs, net of tax	(6,133)		0		0		0		0			(6,133)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	(1,283)
Unrealized gain on interest rate swaps, net of tax	2,653		0		0		0		0			2,653
Unrealized (loss) gain on interest rate swap, tax	960
Stock compensation	5,300		0		5,300		0		0			0
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	3,706		1		3,705		0		0			0
Purchase of treasury stock	(395)		0		0		(395)		0			0
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	307		0		307		0		0			0
Balance, Ending at Sep. 26, 2020	$ 2,031,322		$ 146		$ 415,952		$ (528,506)		$ 2,516,919			$ (373,189)

[1] As of December 30, 2018, the company adopted ASU No. 2017-12, "Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities" using the modified retrospective method. The adoption of this guidance resulted in the recognition of less than $0.1 million as an adjustment to the opening balance of retained earnings.