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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Condensed Consolidated Balance Sheets
Trade receivables, allowances	$ 7,544	$ 9,497	$ 8,566
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares outstanding	45,434,940	45,298,038	44,899,461

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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