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Note 15 - Shares Outstanding and Earnings Per Share: (Tables) | 9 Months Ended
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Sep. 30, 2012
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
(in thousands, except per share data) |  |  |  |  |  |  |  |  |  |  |  |
Weighted average basic shares outstanding |  |  | 10,961 |  |  |  | 10,937 |  |  |  | 10,958 |  |  |  | 10,936 |
Assumed exercise of stock options and issuance of stock awards |  |  | 6 |  |  |  | 14 |  |  |  | 9 |  |  |  | 13 |
Weighted average diluted shares outstanding |  |  | 10,967 |  |  |  | 10,951 |  |  |  | 10,967 |  |  |  | 10,949 |
Net income |  | $ | 1,639 |  |  | $ | 6,136 |  |  | $ | 12,395 |  |  | $ | 24,405 |
Basic earnings per share |  | $ | 0.15 |  |  | $ | 0.56 |  |  | $ | 1.13 |  |  | $ | 2.23 |
Diluted earnings per share |  | $ | 0.15 |  |  | $ | 0.56 |  |  | $ | 1.13 |  |  | $ | 2.23 |
Anti-dilutive securities outstanding |  |  | 190 |  |  |  | 118 |  |  |  | 189 |  |  |  | 118 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration