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Note 2. Details of Consolidated Balance Sheet Accounts | 12 Months Ended
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Dec. 31, 2013
Disclosure Text Block Supplement [Abstract] |
Supplemental Balance Sheet Disclosures [Text Block] | 2. Details of Consolidated Balance Sheet Accounts Prepaid expenses and other: As of December 31, prepaid expenses and other consisted of the following:
(In thousands) |  | 2013 |  |  | 2012 |
License fees |  | $ | 4,169 |  |  | $ | 4,194 |
Tires in service |  |  | 3,982 |  |  |  | 4,261 |
Parts and tires inventory |  |  | 3,133 |  |  |  | 3,067 |
Insurance premiums |  |  | 1,384 |  |  |  | 1,316 |
Other |  |  | 2,606 |  |  |  | 2,652 |
|  | $ | 15,274 |  |  | $ | 15,490 |
Accrued liabilities: As of December 31, accrued liabilities consisted of the following:
(In thousands) |  | 2013 |  |  | 2012 |
Accrued expenses |  | $ | 6,406 |  |  | $ | 4,649 |
Accrued liability to MWL |  |  | 3,892 |  |  |  | — |
Vacation |  |  | 3,872 |  |  |  | 3,560 |
Current income taxes |  |  | 3,106 |  |  |  | 4,032 |
Salaries and wages |  |  | 1,415 |  |  |  | 3,773 |
Other |  |  | 560 |  |  |  | 967 |
|  | $ | 19,251 |  |  | $ | 16,981 |

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