Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts, accounts receivable	$ 2,943	$ 338
Preferred shares, par value	$ 0.10	$ 0.10
Preferred shares, shares authorized	5,000us-gaap_PreferredStockSharesAuthorized	5,000us-gaap_PreferredStockSharesAuthorized
Preferred shares, issued
Common shares, par value	$ 0.10	$ 0.10
Common shares, shares authorized	145,000us-gaap_CommonStockSharesAuthorized	145,000us-gaap_CommonStockSharesAuthorized
Common shares, issued	52,994us-gaap_CommonStockSharesIssued	53,936us-gaap_CommonStockSharesIssued
Common shares, outstanding	52,994us-gaap_CommonStockSharesOutstanding	53,825us-gaap_CommonStockSharesOutstanding
Treasury shares, shares	0us-gaap_TreasuryStockShares	111us-gaap_TreasuryStockShares

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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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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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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