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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Accounts receivable, reserves $ 1,485 $ 2,013
Preferred Shares, without par value      
Preferred Shares, authorized 5,000 5,000
Preferred Shares, issued      
Common Shares, without par value      
Common Shares, authorized 60,000 60,000
Common Shares, issued 27,097 25,994
Common Shares, outstanding 26,222 25,393
Common shares held in treasury, shares 875 601