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Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Accounts Receivable Allowance (in Dollars) | $ 1,711 | $ 1,537
Drivers' Advances and Other Receivables Allowance (in Dollars) | $ 730 | $ 2,499
Treasury stock shares | 1,097,538 | 1,278,408
Common Class A [Member] |  |
Par value (in Dollars per share) | $ 0.01 | $ 0.01
Shares authorized | 20,000,000 | 20,000,000
Shares issued | 13,469,090 | 13,469,090
Shares outstanding | 12,371,552 | 12,190,682
Common Class B [Member] |  |
Par value (in Dollars per share) | $ 0.01 | $ 0.01
Shares authorized | 5,000,000 | 5,000,000
Shares issued | 2,350,000 | 2,350,000
Shares outstanding | 2,350,000 | 2,350,000

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