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	40,480			39,281			1,199
Other comprehensive income (loss)	5,941				2,393		3,548
Cash dividends declared ($0.375 per share)	(8,493)			(8,493)
Dividends to noncontrolling interests	(1,281)						(1,281)
Purchase of noncontrolling interest	(5,510)						(5,510)
Addition of noncontrolling interest	3,200						3,200
Purchase of treasury shares	(14,790)					(14,790)
Stock plan exercises	(1,504)					(1,504)
Stock options exercised	2,972		(2,545)	1,571		3,946
Tax benefit from stock option exercises	0
Stock option expense	1,090		1,090
Stock awards	1,685		1,455			230
Ending balance at Mar. 31, 2018	1,185,356	27,900	0	1,996,474	(276,629)	(602,504)	40,115
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	37,455			36,481			974
Other comprehensive income (loss)	4,580				4,445		135
Cash dividends declared ($0.375 per share)	(8,213)			(8,213)
Dividends to noncontrolling interests	(838)						(838)
Purchase of noncontrolling interest	(23,082)						(23,082)
Purchase of treasury shares	(9,421)					(9,421)
Stock plan exercises	(747)					(747)
Stock options exercised	1,174		(2,667)	2,460		1,381
Stock option expense	728		728
Stock awards	2,942		1,939			1,003
Ending balance at Mar. 30, 2019	$ 1,131,215	$ 27,900	$ 0	$ 2,049,438	$ (298,740)	$ (700,333)	$ 52,950