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Consolidated Balance Sheets (Parenthetical) Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Statement of Financial Position [Abstract]    
Allowance for Doubtful Accounts Receivable, Current $ 569 $ 835
Common Stock, No Par Value $ 0 $ 0
Common Stock, Shares Authorized 200,000,000 200,000,000
Common Stock, Shares, Outstanding 46,541,571 50,083,940
Treasury Stock, Shares 5,214,070 980,177