Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013
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	25,248	25,080	[1]
Common stock, shares outstanding	25,248	25,080	[1]

[1] Derived from December 28, 2013 audited financial statements