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Condensed Consolidated Balance Sheet (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Assets
Allowance for doubtful accounts	$ 1,534	$ 1,988
Shareholders' equity
Common stock, share issued	64,567,556	64,145,573
Common stock, share outstanding	64,567,556	64,145,573

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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