CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 26, 2014	$ 596,032	$ 59,199	$ 384,704	$ 252,865	$ (100,736)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued	18,486	446	18,040	0	0
Shares repurchased	(272,064)	(3,879)	(25,201)	(242,984)	0
Stock compensation cost	19,107	0	19,107	0	0
Tax benefit related to stock options exercised	1,775	0	1,775	0	0
Restricted stock cancelled (issued)	349	0	349	0	0
Net Earnings	345,713	0	0	345,713	0
Dividends declared	(70,086)	0	0	(70,086)	0
Other comprehensive income (loss)	(3,761)	0	0	0	(3,761)
Ending Balance at Dec. 25, 2015	635,551	55,766	398,774	285,508	(104,497)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued	32,777	830	31,947	0	0
Shares repurchased	(50,497)	(762)	(5,449)	(44,286)	0
Stock compensation cost	21,355	0	21,355	0	0
Tax benefit related to stock options exercised	6,913	0	6,913	0	0
Restricted stock cancelled (issued)	(146)	0	(146)	0	0
Net Earnings	40,674	0	0	40,674	0
Dividends declared	(75,076)	0	0	(75,076)	0
Other comprehensive income (loss)	(37,731)	0	0	0	(37,731)
Ending Balance at Dec. 30, 2016	573,820	55,834	453,394	206,820	(142,228)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Split	0	112,879	0	(112,879)	0
Shares issued	36,653	1,489	35,164	0	0
Shares repurchased	(90,160)	(883)	(7,172)	(82,105)	0
Stock compensation cost	18,963	0	18,963	0	0
Restricted stock cancelled (issued)	(415)	0	(415)	0	0
Net Earnings	252,412	0	0	252,412	0
Dividends declared	(82,649)	0	0	(82,649)	0
Other comprehensive income (loss)	14,439	0	0	0	14,439
Ending Balance at Dec. 29, 2017	$ 723,063	$ 169,319	$ 499,934	$ 181,599	$ (127,789)