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Note 8 - Equity Plans (Tables) | 6 Months Ended
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Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Options |  |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 31, 2012 |  |  | 40,339 |  |  | $ | 21.79 |  |  |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  |  |  |
Exercised |  |  | (1,667 | ) |  |  | 3.50 |  |  |  |  |  |
Canceled |  |  | - |  |  |  | - |  |  |  |  |  |
Outstanding at June 30, 2013 |  |  | 38,672 |  |  | $ | 22.58 |  | 2.5 |  | $ | 251 |
Exercisable at June 30, 2013 |  |  | 38,672 |  |  | $ | 22.58 |  | 2.5 |  | $ | 251 |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
|  | For the Three Months Ended June 30, |  |  | For the Six Months Ended June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
(in thousands, except per share data) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
RSU expense before taxes |  | $ | 205 |  |  | $ | 272 |  |  | $ | 449 |  |  | $ | 552 |
RSU expense after taxes |  | $ | 120 |  |  | $ | 163 |  |  | $ | 283 |  |  | $ | 335 |
Impact per basic share |  | $ | 0.01 |  |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.03 |
Impact per diluted share |  | $ | 0.01 |  |  | $ | 0.01 |  |  | $ | 0.03 |  |  | $ | 0.03 |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
|  | Number of Shares |  |  | Weighted Average Granted Price |  |  | Aggregate Intrinsic Value (in thousands) |
Outstanding at December 31, 2012 |  |  | 192,819 |  |  | $ | 26.22 |  |  |  |  |
Granted |  |  | 37,341 |  |  |  | 21.33 |  |  |  |  |
Converted into shares |  |  | - |  |  |  | - |  |  |  |  |
Forfeited |  |  | - |  |  |  | - |  |  |  |  |
Outstanding at June 30, 2013 |  |  | 230,160 |  |  | $ | 25.43 |  |  | $ | 251 |
Vested at June 30, 2013 |  |  | 168,808 |  |  | $ | 26.07 |  |  | $ | 196 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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