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Note 11 - Shares Outstanding and Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2013
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | For the Three Months Ended March 31, |
|  | 2013 |  |  | 2012 |
(in thousands, except per share data) |  |  |  |  |  |
Weighted average basic shares outstanding |  |  | 11,034 |  |  |  | 10,988 |
Assumed exercise of stock options and issuance of stock awards |  |  | 8 |  |  |  | 9 |
Weighted average diluted shares outstanding |  |  | 11,042 |  |  |  | 10,997 |
Net income |  | $ | 5,163 |  |  | $ | 6,230 |
Basic earnings per share |  | $ | 0.47 |  |  | $ | 0.57 |
Diluted earnings per share |  | $ | 0.47 |  |  | $ | 0.57 |
Anti-dilutive securities outstanding |  |  | 201 |  |  |  | 225 |

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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