Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Current assets:
Allowance for Doubtful Accounts Receivable, Current	$ 345	$ 397
Shareholders' equity:
Preferred Stock, Shares Authorized (in shares)	5,000	5,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0
Common Stock, Par or Stated Value Per Share (in shares)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	142,500	142,500
Common Stock, Shares, Issued (in shares)	56,040	56,397
Common Stock, Shares, Outstanding (in shares)	56,040	56,397