Consolidated Statement of Changes in Shareholders Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 27, 2014	$ 488,261	$ 673	$ 189,012	$ 1,255,374	$ (955,613)	$ (1,185)
Beginning Balance (in shares) at Dec. 27, 2014		67,268,817			22,474,331
Net income	30,015			30,015
Dividends	(3,112)			(3,112)
Purchases of common stock (in shares)					464,469
Purchases of common stock	(31,300)				(31,300)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		80,825
Issuance of stock related to stock-based compensation plans, including excess tax effect	(1,154)		(1,154)
Stock-based compensation	1,667		1,667
Other comprehensive loss	(52)					(52)
Ending Balance at Mar. 28, 2015	$ 484,325	$ 673	$ 189,525	$ 1,282,277	$ (986,913)	$ (1,237)
Ending Balance (in shares) at Mar. 28, 2015		67,349,642			22,938,800