Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 27, 2013	Dec. 31, 2012
Accumulated Depreciation	$ 163,646	$ 149,696
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	27,099,238	26,881,257
Common Stock held in treasury, at cost (in shares)	318,825	277,473