Consolidated Statement of Changes in Shareholders Equity - 9 months ended Sep. 24, 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	97,776			97,776
Dividends	(10,572)			(10,572)
Purchases of common stock (in shares)					773,281
Purchases of common stock	(50,516)				$ (50,516)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		130,665			1,642
Issuance of stock related to stock-based compensation plans, including excess tax effect	68	$ 1	177		$ (110)
Stock-based compensation	2,718		2,718
Other comprehensive income	1,019					1,019
Ending Balance (in shares) at Sep. 24, 2016		67,522,281			25,747,002
Ending Balance at Sep. 24, 2016	$ 506,730	$ 675	$ 198,736	$ 1,477,179	$ (1,167,391)	$ (2,469)