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Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Preferred stock (dollars per share)	$ 0.1us-gaap_PreferredStockParOrStatedValuePerShare	$ 0.1us-gaap_PreferredStockParOrStatedValuePerShare
Preferred shares authorized	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Common stock (dollars per share)	$ 0.1us-gaap_CommonStockParOrStatedValuePerShare	$ 0.1us-gaap_CommonStockParOrStatedValuePerShare
Common shares authorized	100,000,000us-gaap_CommonStockSharesAuthorized	100,000,000us-gaap_CommonStockSharesAuthorized
Common shares issued	30,465,522us-gaap_CommonStockSharesIssued	31,423,427us-gaap_CommonStockSharesIssued
Common stock outstanding	30,465,522us-gaap_CommonStockSharesOutstanding	31,423,427us-gaap_CommonStockSharesOutstanding

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Face amount or stated value per share of common stock.

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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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