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Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 0.02us-gaap_CommonStockParOrStatedValuePerShare	$ 0.02us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized	200,000,000us-gaap_CommonStockSharesAuthorized	200,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	46,172,404us-gaap_CommonStockSharesIssued	49,411,486us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	46,172,404us-gaap_CommonStockSharesOutstanding	49,411,486us-gaap_CommonStockSharesOutstanding

X

- Definition

Face amount or stated value per share of common stock.

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- Definition

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.

+ References

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

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