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Segment Reporting (Schedule Of Automotive And Other Segment Reporting) (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |
Revenue | $ 335,739,344 | $ 269,498,969
Income from operations | 97,177,546 | 63,853,639
Automotive Products |  |
Segment Reporting Information [Line Items] |  |
Revenue | 326,364,107 | 262,967,500
Income from operations | 93,444,468 | 62,661,434
Other |  |
Segment Reporting Information [Line Items] |  |
Revenue | 9,375,237 | 6,531,469
Income from operations | $ 3,733,078 | $ 1,192,205

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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