CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interest in consolidated subsidiaries
Beginning balance at Dec. 28, 2019	$ 1,189,745	$ 27,900	$ 0	$ 2,173,802	$ (313,422)	$ (743,942)	$ 45,407
Increase (Decrease) in Shareholders' Equity
Net earnings	105,703			104,878			825
Other comprehensive income (loss)	(7,952)				(8,912)		960
Cash dividends declared	(28,837)			(28,837)
Dividends to noncontrolling interests	(5,642)						(5,642)
Purchase of noncontrolling interest	(50,111)			(30,661)			(19,450)
Addition of noncontrolling interest	5,125						5,125
Purchase of treasury shares, shares acquired	(28,006)					(28,006)
Stock plan exercises, shares acquired	(77)					(77)
Stock options exercised	980		244			736
Stock option expense	1,909		1,909
Stock awards	6,827		6,340			487
Ending balance at Sep. 26, 2020	1,189,664	27,900	8,493	2,219,182	(322,334)	(770,802)	27,225
Beginning balance at Jun. 27, 2020	1,152,702	27,900	0	2,194,916	(332,486)	(763,495)	25,867
Increase (Decrease) in Shareholders' Equity
Net earnings	40,228			39,342			886
Other comprehensive income (loss)	10,624				10,152		472
Cash dividends declared	(9,614)			(9,614)
Purchase of treasury shares, shares acquired	(7,525)					(7,525)
Stock plan exercises, shares acquired	(72)					(72)
Stock options exercised	256		5,461	(5,462)		257
Stock option expense	686		686
Stock awards	2,379		2,346			33
Ending balance at Sep. 26, 2020	1,189,664	27,900	8,493	2,219,182	(322,334)	(770,802)	27,225
Beginning balance at Dec. 26, 2020	1,207,836	27,900	335	2,245,035	(309,786)	(781,422)	25,774
Increase (Decrease) in Shareholders' Equity
Net earnings	169,911			168,774			1,137
Other comprehensive income (loss)	(754)				(436)		(318)
Cash dividends declared	(31,848)			(31,848)
Purchase of treasury shares, shares acquired	(24,100)					(24,100)
Stock plan exercises, shares acquired	(16,955)					(16,955)
Stock options exercised	22,747		(10,294)	(3,886)		36,927
Stock option expense	1,885		1,885
Stock awards	16,010		14,742			1,268
Ending balance at Sep. 25, 2021	1,344,732	27,900	6,668	2,378,075	(310,222)	(784,282)	26,593
Beginning balance at Jun. 26, 2021	1,321,484	27,900	0	2,337,015	(283,435)	(786,857)	26,861
Increase (Decrease) in Shareholders' Equity
Net earnings	52,253			51,650			603
Other comprehensive income (loss)	(27,658)				(26,787)		(871)
Cash dividends declared	(10,617)			(10,617)
Purchase of treasury shares, shares acquired	(2,500)					(2,500)
Stock plan exercises, shares acquired	(33)					(33)
Stock options exercised	2,856		(2,194)	27		5,023
Stock option expense	618		618
Stock awards	8,329		8,244			85
Ending balance at Sep. 25, 2021	$ 1,344,732	$ 27,900	$ 6,668	$ 2,378,075	$ (310,222)	$ (784,282)	$ 26,593