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Note 12 - Net Income Per Share of Class A and Class B Common Stock (Details) - Earnings Per Share Reconciliation (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Numerator: |  |  |  |
Income from continuing operations applicable to common stockholders | $ 34,537 | $ 30,891 | $ 94,401 | $ 78,054
Denominator: |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 26,118 | 25,866 | 26,071 | 25,776
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 26,359 | 26,237 | 26,337 | 26,159
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.31 | $ 1.18 | $ 3.58 | $ 2.98
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.32 | $ 1.19 | $ 3.62 | $ 3.03
Common Class A [Member] | Equity Option [Member] |  |  |  |
Antidilutive Securities |  |  |  |
Shares issuable pursuant to stock options not included since they were antidilutive (in Shares) | 13 | 14 | 13 | 17
Common Class A [Member] | Basic [Member] |  |  |  |
Numerator: |  |  |  |
Distributed income applicable to common stockholders | (3,765) | (3,030) | (10,578) | (6,031)
Numerator: |  |  |  |
Distributed income applicable to common stockholders | 3,765 | 3,030 | 10,578 | 6,031
Common Class A [Member] | Distributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of distributed income as a result of conversion of dilutive stock options | 3 | 5 | 12 | 10
Reallocation of distributed income due to conversion of Class B to Class A common shares outstanding | 406 | 328 | 1,141 | 678
Common Class A [Member] | Diluted [Member] |  |  |  |
Numerator: |  |  |  |
Diluted distributed income applicable to common stockholders | 4,174 | 3,363 | 11,731 | 6,719
Common Class A [Member] | Undistributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of distributed income as a result of conversion of dilutive stock options | 28 | 39 | 82 | 107
Reallocation of distributed income due to conversion of Class B to Class A common shares outstanding | 2,951 | 2,688 | 8,042 | 7,196
Common Class A [Member] |  |  |  |
Numerator: |  |  |  |
Income from continuing operations applicable to common stockholders | 31,149 | 27,831 | 85,124 | 70,063
Basic undistributed income from continuing operations applicable to common stockholders | 27,384 | 24,801 | 74,546 | 64,032
Denominator: |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 23,556 | 23,304 | 23,509 | 23,137
Weighted average number of shares from stock options (in Shares) | 241 | 371 | 266 | 383
Conversion of Class B to Class A common shares outstanding (in Shares) | 2,562 | 2,562 | 2,562 | 2,639
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 26,359 | 26,237 | 26,337 | 26,159
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.31 | $ 1.18 | $ 3.58 | $ 2.98
Diluted distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.16) | $ (0.13) | $ (0.45) | $ (0.26)
Diluted undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.15 | $ 1.05 | $ 3.13 | $ 2.72
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.32 | $ 1.19 | $ 3.62 | $ 3.03
Basic distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.16) | $ (0.13) | $ (0.45) | $ (0.26)
Basic undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.16 | $ 1.06 | $ 3.17 | $ 2.77
Numerator: |  |  |  |
Diluted distributed income applicable to common stockholders | 30,363 | 27,528 | 82,670 | 71,335
Common Class B [Member] | Basic [Member] |  |  |  |
Numerator: |  |  |  |
Distributed income applicable to common stockholders | (409) | (333) | (1,153) | (688)
Numerator: |  |  |  |
Distributed income applicable to common stockholders | 409 | 333 | 1,153 | 688
Common Class B [Member] | Distributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of distributed income as a result of conversion of dilutive stock options | (3) | (5) | (12) | (10)
Common Class B [Member] | Diluted [Member] |  |  |  |
Numerator: |  |  |  |
Diluted distributed income applicable to common stockholders | 406 | 328 | 1,141 | 678
Common Class B [Member] | Undistributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of distributed income as a result of conversion of dilutive stock options | (28) | (39) | (82) | (107)
Common Class B [Member] |  |  |  |
Numerator: |  |  |  |
Income from continuing operations applicable to common stockholders | 3,388 | 3,060 | 9,277 | 7,991
Basic undistributed income from continuing operations applicable to common stockholders | 2,979 | 2,727 | 8,124 | 7,303
Denominator: |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 2,562 | 2,562 | 2,562 | 2,639
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 2,562 | 2,562 | 2,562 | 2,639
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.31 | $ 1.18 | $ 3.58 | $ 2.98
Diluted distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.16) | $ (0.13) | $ (0.45) | $ (0.26)
Diluted undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.15 | $ 1.05 | $ 3.13 | $ 2.72
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.32 | $ 1.19 | $ 3.62 | $ 3.03
Basic distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.16) | $ (0.13) | $ (0.45) | $ (0.26)
Basic undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 1.16 | $ 1.06 | $ 3.17 | $ 2.77
Numerator: |  |  |  |
Diluted distributed income applicable to common stockholders | $ 2,951 | $ 2,688 | $ 8,042 | $ 7,196

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- Definition The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780133-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60A -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780132-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2740-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 66 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2814-109256 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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