Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 29, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,378	$ 1,583
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	10,912,831	10,898,939
Common stock, shares outstanding	9,544,864	9,530,972
Treasury stock, shares	1,367,967	1,367,967