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Note 11 - Shares Outstanding and Earnings Per Share | 3 Months Ended
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Mar. 31, 2013
Earnings Per Share [Text Block] | 11. Shares Outstanding and Earnings Per Share: Earnings per share have been calculated based on the weighted average number of shares outstanding as set forth below:
|  | 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 The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration