Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 28, 2014	Dec. 31, 2013
Accumulated Depreciation	$ 172,547	$ 167,282
Stockholders' Equity:
Preferred stock, par value (in usd per share)	$ 1	$ 1
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 1	$ 1
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	27,357,325	27,189,922
Common Stock held in treasury, at cost (in shares)	364,314	330,487