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Note 15 - Shares Outstanding and Earnings Per Share: (Tables) | 6 Months Ended
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Jun. 30, 2012
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
(in thousands, except per share data) |  |  |  |  |  |  |  |  |  |  |  |
Weighted average basic shares outstanding |  |  | 10,960 |  |  |  | 10,935 |  |  |  | 10,956 |  |  |  | 10,935 |
Assumed exercise of stock options and issuance of stock awards |  |  | 29 |  |  |  | 12 |  |  |  | 31 |  |  |  | 12 |
Weighted average diluted shares outstanding |  |  | 10,989 |  |  |  | 10,947 |  |  |  | 10,987 |  |  |  | 10,947 |
Net income |  | $ | 4,526 |  |  | $ | 7,946 |  |  | $ | 10,756 |  |  | $ | 18,269 |
Basic earnings per share |  | $ | 0.41 |  |  | $ | 0.73 |  |  | $ | 0.98 |  |  | $ | 1.67 |
Diluted earnings per share |  | $ | 0.41 |  |  | $ | 0.73 |  |  | $ | 0.98 |  |  | $ | 1.67 |
Anti-dilutive securities outstanding |  |  | 178 |  |  |  | 118 |  |  |  | 178 |  |  |  | 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