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           Business and Summary of Significant Accounting Principles (Surcharges reported gross) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        3 Months Ended | |
|---|---|---|
| 
           Mar. 31, 2013 
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           Mar. 31, 2012 
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| Taxes, Miscellaneous [Abstract] | ||
| Surcharges reported gross | $ 1,228 | $ 1,482 | 
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- Definition 
          The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Details 
          
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