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Note 10 - Net Income Per Share of Class A and Class B Common Stock (Tables) | 6 Months Ended
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Jun. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
Three Months Ended June 30, |  | 2015 |  |  | 2014 |
Basic EPS from Continuing Operations |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations applicable to common stockholders |  | $ | 46,239 |  |  | $ | 4,984 |  |  | $ | 31,720 |  |  | $ | 3,450 |
Distributed income applicable to common stockholders |  |  | (4,754 | ) |  |  | (512 | ) |  |  | (3,769 | ) |  |  | (410 | )
Basic undistributed income from continuing operations applicable to common stockholders |  | $ | 41,485 |  |  | $ | 4,472 |  |  | $ | 27,951 |  |  | $ | 3,040 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share |  |  | 23,770 |  |  |  | 2,562 |  |  |  | 23,557 |  |  |  | 2,562 |
Basic income per share from continuing operations applicable to common stockholders |  | $ | 1.95 |  |  | $ | 1.95 |  |  | $ | 1.35 |  |  | $ | 1.35 |
Basic distributed income per share from continuing operations applicable to common stockholders |  |  | (0.20 | ) |  |  | (0.20 | ) |  |  | (0.16 | ) |  |  | (0.16 | )
Basic undistributed income per share from continuing operations applicable to common stockholders |  | $ | 1.75 |  |  | $ | 1.75 |  |  | $ | 1.19 |  |  | $ | 1.19 |
Three Months Ended June 30, |  | 2015 |  |  | 2014 |
Diluted EPS from Continuing Operations |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed income applicable to common stockholders |  | $ | 4,754 |  |  | $ | 512 |  |  | $ | 3,769 |  |  | $ | 410 |
Reallocation of distributed income as a result of conversion of dilutive stock options |  |  | 3 |  |  |  | (3 | ) |  |  | 3 |  |  |  | (3 | )
Reallocation of distributed income due to conversion of Class B to Class A common shares outstanding |  |  | 509 |  |  |  | - |  |  |  | 407 |  |  |  | - |
Diluted distributed income applicable to common stockholders |  | $ | 5,266 |  |  | $ | 509 |  |  | $ | 4,179 |  |  | $ | 407 |
Undistributed income from continuing operations applicable to common stockholders |  | $ | 41,485 |  |  | $ | 4,472 |  |  | $ | 27,951 |  |  | $ | 3,040 |
Reallocation of undistributed income as a result of conversion of dilutive stock options |  |  | 28 |  |  |  | (28 | ) |  |  | 25 |  |  |  | (25 | )
Reallocation of undistributed income due to conversion of Class B to Class A |  |  | 4,444 |  |  |  | - |  |  |  | 3,015 |  |  |  | - |
Diluted undistributed income from continuing operations applicable to common stockholders |  | $ | 45,957 |  |  | $ | 4,444 |  |  | $ | 30,991 |  |  | $ | 3,015 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share from continuing operations |  |  | 23,770 |  |  |  | 2,562 |  |  |  | 23,557 |  |  |  | 2,562 |
Weighted average number of shares from stock options |  |  | 164 |  |  |  | - |  |  |  | 212 |  |  |  | - |
Conversion of Class B to Class A common shares outstanding |  |  | 2,562 |  |  |  | - |  |  |  | 2,562 |  |  |  | - |
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations |  |  | 26,496 |  |  |  | 2,562 |  |  |  | 26,331 |  |  |  | 2,562 |
Diluted income per share from continuing operations applicable to common stockholders |  | $ | 1.93 |  |  | $ | 1.93 |  |  | $ | 1.34 |  |  | $ | 1.34 |
Diluted distributed income per share from continuing operations applicable to common stockholders |  |  | (0.20 | ) |  |  | (0.20 | ) |  |  | (0.16 | ) |  |  | (0.16 | )
Diluted undistributed income per share from continuing operations applicable to common stockholders |  | $ | 1.73 |  |  | $ | 1.73 |  |  | $ | 1.18 |  |  | $ | 1.18 |
Three Months Ended June 30, |  | 2015 |  |  | 2014 |
Diluted EPS |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Antidilutive Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issuable pursuant to stock options not included since they were antidilutive |  |  | 17 |  |  |  | - |  |  |  | 12 |  |  |  | - |
Six Months Ended June 30, |  | 2015 |  |  | 2014 |
Basic EPS from Continuing Operations |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations applicable to common stockholders |  | $ | 82,929 |  |  | $ | 8,947 |  |  | $ | 53,976 |  |  | $ | 5,888 |
Distributed income applicable to common stockholders |  |  | (8,559 | ) |  |  | (923 | ) |  |  | (6,814 | ) |  |  | (743 | )
Basic undistributed income from continuing operations applicable to common stockholders |  | $ | 74,370 |  |  | $ | 8,024 |  |  | $ | 47,162 |  |  | $ | 5,145 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share |  |  | 23,748 |  |  |  | 2,562 |  |  |  | 23,485 |  |  |  | 2,562 |
Basic income per share from continuing operations applicable to common stockholders |  | $ | 3.49 |  |  | $ | 3.49 |  |  | $ | 2.30 |  |  | $ | 2.30 |
Basic distributed income per share from continuing operations applicable to common stockholders |  |  | (0.36 | ) |  |  | (0.36 | ) |  |  | (0.29 | ) |  |  | (0.29 | )
Basic undistributed income per share from continuing operations applicable to common stockholders |  | $ | 3.13 |  |  | $ | 3.13 |  |  | $ | 2.01 |  |  | $ | 2.01 |
Six Months Ended June 30, |  | 2015 |  |  | 2014 |
Diluted EPS from Continuing Operations |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed income applicable to common stockholders |  | $ | 8,559 |  |  | $ | 923 |  |  | $ | 6,814 |  |  | $ | 743 |
Reallocation of distributed income as a result of conversion of dilutive stock options |  |  | 7 |  |  |  | (7 | ) |  |  | 8 |  |  |  | (8 | )
Reallocation of distributed income due to conversion of Class B to Class A common shares outstanding |  |  | 916 |  |  |  | - |  |  |  | 735 |  |  |  | - |
Diluted distributed income applicable to common stockholders |  | $ | 9,482 |  |  | $ | 916 |  |  | $ | 7,557 |  |  | $ | 735 |
Undistributed income from continuing operations applicable to common stockholders |  | $ | 74,370 |  |  | $ | 8,024 |  |  | $ | 47,162 |  |  | $ | 5,145 |
Reallocation of undistributed income as a result of conversion of dilutive stock options |  |  | 61 |  |  |  | (61 | ) |  |  | 55 |  |  |  | (55 | )
Reallocation of undistributed income due to conversion of Class B to Class A |  |  | 7,963 |  |  |  | - |  |  |  | 5,090 |  |  |  | - |
Diluted undistributed income from continuing operations applicable to common stockholders |  | $ | 82,394 |  |  | $ | 7,963 |  |  | $ | 52,307 |  |  | $ | 5,090 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share from continuing operations |  |  | 23,748 |  |  |  | 2,562 |  |  |  | 23,485 |  |  |  | 2,562 |
Weighted average number of shares from stock options |  |  | 199 |  |  |  | - |  |  |  | 279 |  |  |  | - |
Conversion of Class B to Class A common shares outstanding |  |  | 2,562 |  |  |  | - |  |  |  | 2,562 |  |  |  | - |
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations |  |  | 26,509 |  |  |  | 2,562 |  |  |  | 26,326 |  |  |  | 2,562 |
Diluted income per share from continuing operations applicable to common stockholders |  | $ | 3.47 |  |  | $ | 3.47 |  |  | $ | 2.27 |  |  | $ | 2.27 |
Diluted distributed income per share from continuing operations applicable to common stockholders |  |  | (0.36 | ) |  |  | (0.36 | ) |  |  | (0.29 | ) |  |  | (0.29 | )
Diluted undistributed income per share from continuing operations applicable to common stockholders |  | $ | 3.11 |  |  | $ | 3.11 |  |  | $ | 1.98 |  |  | $ | 1.98 |
Six Months Ended June 30, |  | 2015 |  |  | 2014 |
Diluted EPS |  | Class A |  |  | Class B |  |  | Class A |  |  | Class B |
Antidilutive Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issuable pursuant to stock options not included since they were antidilutive |  |  | 16 |  |  |  | - |  |  |  | 14 |  |  |  | - |

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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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