Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1	[1]
Preferred stock, shares authorized	1,000	1,000	[1]
Preferred stock, shares issued	0	0	[1]
Common stock, par value	$ 1	$ 1	[1]
Common stock, shares authorized	60,000	60,000	[1]
Common stock, shares issued	24,942	24,632	[1]
Common stock, shares outstanding	24,942	24,632	[1]

[1] Derived from December 29, 2012 audited financial statements