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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	140,879,384	140,733,683
Common stock, shares outstanding (in shares)	140,879,384	140,733,683

X

- Definition

Face amount or stated value per share of common stock.

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-Name Accounting Standards Codification



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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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-Topic 210



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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

Reference 1: http://www.xbrl.org/2003/role/presentationRef



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

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