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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Numerator: |  |  |  |
Income from continuing operations applicable to common stockholders | $ 25,281 | $ 20,005 | $ 47,163 | $ 36,639
Denominator: |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 25,782 | 25,730 | 25,730 | 25,860
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 26,134 | 26,185 | 26,120 | 26,331
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.97 | $ 0.76 | $ 1.81 | $ 1.39
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.98 | $ 0.78 | $ 1.83 | $ 1.42
Equity Option [Member] | Common Class A [Member] |  |  |  |
Antidilutive Securities |  |  |  |
Shares issuable pursuant to stock options not included since they were antidilutive (in Shares) | 18 | 45 | 19 | 90
Common Class A [Member] | Basic [Member] |  |  |  |
Numerator: |  |  |  |
Distributed income applicable to common stockholders | (3,018) | (2,230) | (3,007) | (3,779)
Numerator: |  |  |  |
Distributed income applicable to common stockholders | 3,018 | 2,230 | 3,007 | 3,779
Common Class A [Member] | Distributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of income as a result of conversion of dilutive stock options | 5 | 6 | 5 | 11
Reallocation of income due to conversion of Class B to Class A | 333 | 348 | 344 | 608
Common Class A [Member] | Diluted [Member] |  |  |  |
Numerator: |  |  |  |
Distributed income applicable to common stockholders | (3,356) | (2,584) | (3,356) | (4,398)
Numerator: |  |  |  |
Distributed income applicable to common stockholders | 3,356 | 2,584 | 3,356 | 4,398
Common Class A [Member] | Undistributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of income as a result of conversion of dilutive stock options | 30 | 42 | 69 | 81
Reallocation of income due to conversion of Class B to Class A | 2,179 | 2,348 | 4,491 | 4,456
Common Class A [Member] |  |  |  |
Numerator: |  |  |  |
Income from continuing operations applicable to common stockholders | 22,734 | 17,261 | 42,254 | 31,483
Undistributed income from continuing operations applicable to common stockholders | 19,716 | 15,031 | 39,247 | 27,704
Denominator: |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 23,185 | 22,201 | 23,052 | 22,221
Weighted average number of shares from stock options (in Shares) | 352 | 455 | 390 | 471
Conversion of Class B to Class A common shares outstanding (in Shares) | 2,597 | 3,529 | 2,678 | 3,639
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 26,134 | 26,185 | 26,120 | 26,331
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.97 | $ 0.76 | $ 1.81 | $ 1.39
Diluted distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) | $ (0.10) | $ (0.13) | $ (0.17)
Diluted undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.84 | $ 0.66 | $ 1.68 | $ 1.22
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.98 | $ 0.78 | $ 1.83 | $ 1.42
Basic distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) | $ (0.10) | $ (0.13) | $ (0.17)
Basic undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.85 | $ 0.68 | $ 1.70 | $ 1.25
Numerator: |  |  |  |
Diluted undistributed income from continuing operations applicable to common stockholders | 21,925 | 17,421 | 43,807 | 32,241
Common Class B [Member] | Basic [Member] |  |  |  |
Numerator: |  |  |  |
Distributed income applicable to common stockholders | (338) | (354) | (349) | (619)
Numerator: |  |  |  |
Distributed income applicable to common stockholders | 338 | 354 | 349 | 619
Common Class B [Member] | Distributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of income as a result of conversion of dilutive stock options | (5) | (6) | (5) | (11)
Common Class B [Member] | Diluted [Member] |  |  |  |
Numerator: |  |  |  |
Distributed income applicable to common stockholders | (333) | (348) | (344) | (608)
Numerator: |  |  |  |
Distributed income applicable to common stockholders | 333 | 348 | 344 | 608
Common Class B [Member] | Undistributed [Member] |  |  |  |
Numerator: |  |  |  |
Reallocation of income as a result of conversion of dilutive stock options | (30) | (42) | (69) | (81)
Common Class B [Member] |  |  |  |
Numerator: |  |  |  |
Income from continuing operations applicable to common stockholders | 2,547 | 2,744 | 4,909 | 5,156
Undistributed income from continuing operations applicable to common stockholders | 2,209 | 2,390 | 4,560 | 4,537
Denominator: |  |  |  |
Weighted average number of shares outstanding used to calculate basic income per share (in Shares) | 2,597 | 3,529 | 2,678 | 3,639
Weighted average number of shares outstanding used to calculate diluted income per share from continuing operations (in Shares) | 2,597 | 3,529 | 2,678 | 3,639
Diluted income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.97 | $ 0.76 | $ 1.81 | $ 1.39
Diluted distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) | $ (0.10) | $ (0.13) | $ (0.17)
Diluted undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.84 | $ 0.66 | $ 1.68 | $ 1.22
Basic income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.98 | $ 0.78 | $ 1.83 | $ 1.42
Basic distributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ (0.13) | $ (0.10) | $ (0.13) | $ (0.17)
Basic undistributed income per share from continuing operations applicable to common stockholders (in Dollars per share) | $ 0.85 | $ 0.68 | $ 1.70 | $ 1.25
Numerator: |  |  |  |
Diluted undistributed income from continuing operations applicable to common stockholders | $ 2,179 | $ 2,348 | $ 4,491 | $ 4,456

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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 The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security. + 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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 65 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2793-109256 + Details
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- Definition The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security, after giving effect to all dilutive potential common shares outstanding during the period. + References No definition available. + 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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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + 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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