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Note 17 - Net Income Per Share of Class A and Class B Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Year Ended December 31, |  | 2013 |  |  | 2012 |  |  | 2011 |
Basic EPS |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations applicable to common stockholders |  | $ | 94,532 |  |  | $ | 10,682 |  |  | $ | 69,069 |  |  | $ | 10,326 |  |  | $ | 47,292 |  |  | $ | 7,918 |
Distributed income applicable to common stockholders |  |  | (9,061 | ) |  |  | (1,024 | ) |  |  | (10,497 | ) |  |  | (1,569 | ) |  |  | (5,844 | ) |  |  | (978 | )
Basic undistributed income from continuing operations applicable to common stockholders |  | $ | 85,471 |  |  | $ | 9,658 |  |  | $ | 58,572 |  |  | $ | 8,757 |  |  | $ | 41,448 |  |  | $ | 6,940 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares out-standing used to calculate basic income per share |  |  | 23,185 |  |  |  | 2,620 |  |  |  | 22,354 |  |  |  | 3,342 |  |  |  | 22,468 |  |  |  | 3,762 |
Basic income from continuing operations per share applicable to common stockholders |  | $ | 4.08 |  |  | $ | 4.08 |  |  | $ | 3.09 |  |  | $ | 3.09 |  |  | $ | 2.10 |  |  | $ | 2.10 |
Basic distributed income per share applicable to common stockholders |  |  | (0.39 | ) |  |  | (0.39 | ) |  |  | (0.47 | ) |  |  | (0.47 | ) |  |  | (0.26 | ) |  |  | (0.26 | )
Basic undistributed income from continuing operations per share applicable to common stockholders |  | $ | 3.69 |  |  | $ | 3.69 |  |  | $ | 2.62 |  |  | $ | 2.62 |  |  | $ | 1.84 |  |  | $ | 1.84 |
Year Ended December 31, |  | 2013 |  |  | 2012 |  |  | 2011 |
Diluted EPS |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed income applicable to common stockholders |  | $ | 9,061 |  |  | $ | 1,024 |  |  | $ | 10,497 |  |  | $ | 1,569 |  |  | $ | 5,844 |  |  | $ | 978 |
Reallocation of distributed income as a result of conversion of dilutive stock options |  |  | 15 |  |  |  | (15 | ) |  |  | 28 |  |  |  | (28 | ) |  |  | 15 |  |  |  | (15 | )
Reallocation of distributed income due to conversion of Class B to Class A |  |  | 1,009 |  |  |  | - |  |  |  | 1,541 |  |  |  | - |  |  |  | 963 |  |  |  | - |
Diluted distributed income applicable to common stockholders |  | $ | 10,085 |  |  | $ | 1,009 |  |  | $ | 12,066 |  |  | $ | 1,541 |  |  | $ | 6,822 |  |  | $ | 963 |
Undistributed income from continuing operations applicable to common stockholders |  | $ | 85,471 |  |  | $ | 9,658 |  |  | $ | 58,572 |  |  | $ | 8,757 |  |  | $ | 41,448 |  |  | $ | 6,940 |
Reallocation of undistributed income as a result of conversion of dilutive stock options |  |  | 142 |  |  |  | (142 | ) |  |  | 159 |  |  |  | (159 | ) |  |  | 113 |  |  |  | (113 | )
Reallocation of undistributed income due to conversion of Class B to Class A |  |  | 9,516 |  |  |  | - |  |  |  | 8,598 |  |  |  | - |  |  |  | 6,827 |  |  |  | - |
Diluted undistributed income from continuing operations applicable to common stockholders |  | $ | 95,129 |  |  | $ | 9,516 |  |  | $ | 67,329 |  |  | $ | 8,598 |  |  | $ | 48,388 |  |  | $ | 6,827 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share |  |  | 23,185 |  |  |  | 2,620 |  |  |  | 22,354 |  |  |  | 3,342 |  |  |  | 22,468 |  |  |  | 3,762 |
Weighted average number of shares from stock options |  |  | 386 |  |  |  | - |  |  |  | 474 |  |  |  | - |  |  |  | 434 |  |  |  | - |
Conversion of Class B to Class A |  |  | 2,620 |  |  |  | - |  |  |  | 3,342 |  |  |  | - |  |  |  | 3,762 |  |  |  | - |
Weighted average number of shares outstanding used to calculate diluted income per share |  |  | 26,191 |  |  |  | 2,620 |  |  |  | 26,170 |  |  |  | 3,342 |  |  |  | 26,664 |  |  |  | 3,762 |
Year Ended December 31, |  | 2013 |  |  | 2012 |  |  | 2011 |
Diluted EPS |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Diluted income from continuing operations per share available to common stockholders |  | $ | 4.02 |  |  | $ | 4.02 |  |  | $ | 3.03 |  |  | $ | 3.03 |  |  | $ | 2.07 |  |  | $ | 2.07 |
Diluted distributed income from continuing operations per share applicable to common stockholders |  |  | (0.39 | ) |  |  | (0.39 | ) |  |  | (0.47 | ) |  |  | (0.47 | ) |  |  | (0.26 | ) |  |  | (0.26 | )
Diluted undistributed income from continuing operations per share applicable to common stockholders |  | $ | 3.63 |  |  | $ | 3.63 |  |  | $ | 2.56 |  |  | $ | 2.56 |  |  | $ | 1.81 |  |  | $ | 1.81 |
Antidilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issuable pursuant to stock options not included since they were antidilutive |  |  | 16 |  |  |  | - |  |  |  | 45 |  |  |  | - |  |  |  | 280 |  |  |  | - |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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