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. 26, 2015	$ 965,211	$ 27,900	$ 0	$ 1,729,679	$ (267,218)	$ (571,920)	$ 46,770
Increase (Decrease) in Shareholders' Equity
Net earnings	77,613			74,995			2,618
Other comprehensive income (loss)	255				(1,241)		1,496
Cash dividends declared	(17,027)			(17,027)			0
Dividends to noncontrolling interests	(1,923)						(1,923)
Purchase of noncontrolling interests	(11,009)		(137)				(10,872)
Purchase of treasury shares	(28,621)					(28,621)
Stock plan exercises	(1,453)					(1,453)
Stock options exercised	5,975		(4,064)	2,473		7,566
Stock option expense	2,959		2,959
Stock awards	2,191		1,242			949
Ending balance at Jun. 25, 2016	994,171	27,900	0	1,790,120	(268,459)	(593,479)	38,089
Beginning balance at Dec. 31, 2016	982,586	27,900	0	1,874,722	(346,359)	(612,781)	39,104
Increase (Decrease) in Shareholders' Equity
Net earnings	87,283			84,643			2,640
Other comprehensive income (loss)	39,902				40,560		(658)
Cash dividends declared	(16,939)			(16,939)			0
Dividends to noncontrolling interests	(2,889)						(2,889)
Stock plan exercises	(3,056)					(3,056)
Stock options exercised	10,168		(4,590)	3,448		11,310
Stock option expense	2,578		2,578
Stock awards	2,813		2,012			801
Ending balance at Jul. 01, 2017	$ 1,102,446	$ 27,900	$ 0	$ 1,945,874	$ (305,799)	$ (603,726)	$ 38,197