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Note 8 - Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 1 Months Ended | 12 Months Ended |  | 12 Months Ended | 29 Months Ended |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Nov. 30, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Additional Shares Authorized [Member] Common Class A [Member] | Dec. 31, 2013 Common Class A [Member] | Dec. 31, 2012 Common Class A [Member] | Dec. 31, 2011 Common Class A [Member] | Dec. 31, 2013 Common Class A [Member] | Aug. 31, 2011 Common Class A [Member] | Jun. 30, 2000 Common Class A [Member] | Dec. 31, 2013 Common Class B [Member]
Note 8 - Stockholders' Equity (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Voting Rights |  |  |  |  |  |  | one |  |  |  |  |  | ten
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  |  |  |  | 1,000,000 |  |  |  |  | 2,000,000 | 1,000,000 |
Stock Repurchased During Period, Shares |  |  |  |  | 419,376 |  |  |  |  | 1,273,047 |  |  |
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share) |  |  |  |  |  |  |  |  |  | $ 24.18 |  |  |
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased |  |  |  |  |  |  | 1,726,953 |  |  | 1,726,953 |  |  |
Shares Paid for Tax Withholding for Share Based Compensation |  |  |  |  |  |  | 59,721 | 80,687 | 56,012 |  |  |  |
Payments of Dividends (in Dollars) | $ 2,600 | $ 2,500 | $ 10,085 | $ 12,066 | $ 6,822 |  |  |  |  |  |  |  |

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- Definition Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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