Parenthetical Data to the Condensed Consolidated Balance Sheets (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Accounts Receivable, allowance	$ 1,447	$ 1,996
Other acquired intangibles, accumulated amortization	$ 19,167	$ 16,871
Shareholders' equity:
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, authorized shares	50,000,000	50,000,000
Common Stock, issued shares	29,377,550	29,030,919
Common Stock, outstanding shares	29,377,550	29,030,919

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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