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. 30, 2017	$ 1,151,795	$ 27,900	$ 0	$ 1,954,344	$ (279,022)	$ (590,386)	$ 38,959
Increase (Decrease) in Shareholders' Equity
Net earnings	75,160			72,241			2,919
Other comprehensive income (loss)	(29,202)				(32,144)		2,942
Cash dividends declared ($0.75 per share)	(16,893)			(16,893)
Dividends to noncontrolling interests	(4,852)						(4,852)
Purchase of noncontrolling interest	(5,510)						(5,510)
Addition of noncontrolling interest	3,200						3,200
Purchase of treasury shares	(43,999)					(43,999)
Stock plan exercises	(1,769)					(1,769)
Stock options exercised	5,711		(4,459)	3,418		6,752
Stock option expense	2,151		2,151
Stock awards	3,223		2,308			915
Ending balance at Jun. 30, 2018	1,149,824	27,900	0	2,023,919	(311,166)	(628,487)	37,658
Increase (Decrease) in Shareholders' Equity
Cumulative impact of ASC adoptions | Impact of ASU 2016-16 adoption	1,038			1,038
Beginning balance at Mar. 31, 2018	1,185,356	27,900	0	1,996,474	(276,629)	(602,504)	40,115
Increase (Decrease) in Shareholders' Equity
Net earnings	34,680			32,960			1,720
Other comprehensive income (loss)	(35,143)				(34,537)		(606)
Cash dividends declared ($0.75 per share)	(8,400)			(8,400)
Dividends to noncontrolling interests	(3,571)						(3,571)
Purchase of treasury shares	(29,209)					(29,209)
Stock plan exercises	(265)					(265)
Stock options exercised	2,739		(1,914)	1,847		2,806
Stock option expense	1,061		1,061
Stock awards	1,538		853			685
Ending balance at Jun. 30, 2018	1,149,824	27,900	0	2,023,919	(311,166)	(628,487)	37,658
Beginning balance at Dec. 29, 2018	1,135,523	27,900	0	2,027,596	(303,185)	(692,549)	75,761
Increase (Decrease) in Shareholders' Equity
Net earnings	79,801			77,878			1,923
Other comprehensive income (loss)	282				113		169
Cash dividends declared ($0.75 per share)	(16,339)			(16,339)
Dividends to noncontrolling interests	(4,459)						(4,459)
Purchase of noncontrolling interest	(27,845)		277				(28,122)
Purchase of treasury shares	(38,350)					(38,350)
Stock plan exercises	(827)					(827)
Stock options exercised	1,744		(5,242)	5,345		1,641
Stock option expense	1,456		1,456
Stock awards	4,914		3,509			1,405
Ending balance at Jun. 29, 2019	1,127,014	27,900	0	2,085,594	(303,072)	(728,680)	45,272
Beginning balance at Mar. 30, 2019	1,131,215	27,900	0	2,049,438	(298,740)	(700,333)	52,950
Increase (Decrease) in Shareholders' Equity
Net earnings	42,346			41,397			949
Other comprehensive income (loss)	(4,298)				(4,332)		34
Cash dividends declared ($0.75 per share)	(8,126)			(8,126)
Dividends to noncontrolling interests	(3,621)						(3,621)
Purchase of noncontrolling interest	(4,763)		277				(5,040)
Purchase of treasury shares	(28,929)					(28,929)
Stock plan exercises	(80)					(80)
Stock options exercised	570		(2,575)	2,885		260
Stock option expense	728		728
Stock awards	1,972		1,570			402
Ending balance at Jun. 29, 2019	$ 1,127,014	$ 27,900	$ 0	$ 2,085,594	$ (303,072)	$ (728,680)	$ 45,272