Consolidated Statement of Changes in 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. 28, 2013	$ 454,481	$ 670	$ 179,807	$ 1,173,044	$ (899,028)	$ (12)
Beginning Balance (in shares) at Dec. 28, 2013		67,017,858			21,528,693
Net income	63,563			63,563
Dividends	(5,420)			(5,420)
Purchases of common stock (in shares)					939,872
Purchases of common stock	(56,393)				(56,393)
Issuance of stock related to stock-based compensation plans, including excess tax effect (in shares)		144,543			3,139
Issuance of stock related to stock-based compensation plans, including excess tax effect	1,056	2	1,075		(21)
Stock-based compensation	2,799		2,799
Other comprehensive loss	(28)					(28)
Ending Balance at Jun. 28, 2014	$ 460,058	$ 672	$ 183,681	$ 1,231,187	$ (955,442)	$ (40)
Ending Balance (in shares) at Jun. 28, 2014		67,162,401			22,471,704