| **Income Taxes**                     | 6 Months Ended                                                                                                                                                                           |
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| **Income Tax Disclosure [Abstract]** |                                                                                                                                                                                     |
| Income Taxes                         | Income Taxes The provision for income taxes in the second quarter of 2012 reflects an estimated annual tax rate of 27 percent compared to 26 percent in the second quarter of 2011. |

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| - Definition
The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.
+ References
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