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Note E - Segment Information (Details) - Revenue by Operating Segment (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Segment Reporting Information [Line Items] |  |  |  |
Amount (in Dollars) | $ 79,163 | $ 74,432 | $ 237,648 | $ 223,300
Percentage | 100.00% | 100.00% | 100.00% | 100.00%
Truckload Services [Member] | Sales [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Amount (in Dollars) | 73,857 | 68,518 | 219,471 | 204,665
Percentage | 93.30% | 92.10% | 92.40% | 91.70%
Brokerage and Logistics Services [Member] | Sales [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Amount (in Dollars) | $ 5,306 | $ 5,914 | $ 18,177 | $ 18,635
Percentage | 6.70% | 7.90% | 7.60% | 8.30%

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