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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) $ in Thousands	Jun. 30, 2018 USD ($) shares	Jun. 30, 2018 ₪ / shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2017 ₪ / shares
Statement of Financial Position [Abstract]
Trade receivables, allowance for doubtful accounts | $	$ 5,721		$ 7,883
Ordinary shares, par value | ₪ / shares		₪ 0.01		₪ 0.01
Ordinary shares, shares authorized	120,000,000		120,000,000
Ordinary shares, shares issued	81,851,915		81,526,715
Ordinary shares, shares outstanding	78,370,392		78,045,192
Treasury stock, ordinary shares	3,481,523		3,481,523

X

- Definition

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 per share of common stock.

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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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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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