Consolidated Statement of Changes in Shareholders Equity - 6 months ended Jun. 25, 2016 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 26, 2015		67,391,616			24,972,079
Beginning Balance at Dec. 26, 2015	$ 466,237	$ 674	$ 195,841	$ 1,389,975	$ (1,116,765)	$ (3,488)
Net income	61,498			61,498
Dividends	(6,782)			(6,782)
Purchases of common stock (in shares)					423,281
Purchases of common stock	(26,485)				$ (26,485)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		113,169			1,642
Issuance of stock related to stock-based compensation plans, including excess tax effect	(513)	$ 1	(404)		$ (110)
Stock-based compensation	2,066		2,066
Other comprehensive income	1,234					1,234
Ending Balance (in shares) at Jun. 25, 2016		67,504,785			25,397,002
Ending Balance at Jun. 25, 2016	$ 497,255	$ 675	$ 197,503	$ 1,444,691	$ (1,143,360)	$ (2,254)