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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
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Numerator: |  |
Income from continuing operations applicable to common stockholders | $ 24,694 | $ 21,882
Denominator: |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 25,973 | 25,626
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 26,320 | 26,054
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.94 | $ 0.84
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.95 | $ 0.85
Equity Option [Member] | Common Class A [Member] |  |
Antidilutive Securities |  |
Shares issuable pursuant to stock options not included since they were antidilutive (in Shares) | 16 | 20
Common Class A [Member] | Basic [Member] |  |
Numerator: |  |
Distributed income applicable to common stockholders | (3,045) |
Numerator: |  |
Distributed income applicable to common stockholders | 3,045 |
Common Class A [Member] | Distributed [Member] |  |
Numerator: |  |
Reallocation of income as a result of conversion of dilutive stock options | 4 |
Reallocation of income due to conversion of Class B to Class A | 329 |
Common Class A [Member] | Diluted [Member] |  |
Numerator: |  |
Distributed income applicable to common stockholders | (3,378) |
Numerator: |  |
Distributed income applicable to common stockholders | 3,378 |
Common Class A [Member] | Undistributed [Member] |  |
Numerator: |  |
Reallocation of income as a result of conversion of dilutive stock options | 28 | 39
Reallocation of income due to conversion of Class B to Class A | 2,075 | 2,318
Common Class A [Member] |  |
Numerator: |  |
Income from continuing operations applicable to common stockholders | 22,258 | 19,525
Undistributed income from continuing operations applicable to common stockholders | 19,213 | 19,525
Denominator: |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 23,411 | 22,866
Weighted average number of shares from stock options (in Shares) | 347 | 428
Conversion of Class B to Class A common shares outstanding (in Shares) | 2,562 | 2,760
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 26,320 | 26,054
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.94 | $ 0.84
Diluted distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) |
Diluted undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.81 | $ 0.84
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.95 | $ 0.85
Basic distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) |
Basic undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.82 | $ 0.85
Numerator: |  |
Diluted undistributed income from continuing operations applicable to common stockholders | 21,316 | 21,882
Common Class B [Member] | Basic [Member] |  |
Numerator: |  |
Distributed income applicable to common stockholders | (333) |
Numerator: |  |
Distributed income applicable to common stockholders | 333 |
Common Class B [Member] | Distributed [Member] |  |
Numerator: |  |
Reallocation of income as a result of conversion of dilutive stock options | (4) |
Common Class B [Member] | Diluted [Member] |  |
Numerator: |  |
Distributed income applicable to common stockholders | (329) |
Numerator: |  |
Distributed income applicable to common stockholders | 329 |
Common Class B [Member] | Undistributed [Member] |  |
Numerator: |  |
Reallocation of income as a result of conversion of dilutive stock options | (28) | (39)
Common Class B [Member] |  |
Numerator: |  |
Income from continuing operations applicable to common stockholders | 2,436 | 2,357
Undistributed income from continuing operations applicable to common stockholders | 2,103 | 2,357
Denominator: |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 2,562 | 2,760
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 2,562 | 2,760
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.94 | $ 0.84
Diluted distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) |
Diluted undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.81 | $ 0.84
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.95 | $ 0.85
Basic distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) |
Basic undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.82 | $ 0.85
Numerator: |  |
Diluted undistributed income from continuing operations applicable to common stockholders | $ 2,075 | $ 2,318

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- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise of stock options or restrictive stock units (RSUs). + 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 + Details
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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 Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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