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Note 8 - Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2013
Income Tax Disclosure [Abstract] |
Schedule Of Income Tax Expense Benefit And Effective Income Tax Rate [Table Text Block] |
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
Income tax expense |  | $ | 3,573 |  |  | $ | 6,926 |  |  | $ | 5,224 |  |  | $ | 9,215 |
Effective income tax rate |  |  | 41.0 | % |  |  | 38.6 | % |  |  | 46.5 | % |  |  | 39.1 | %

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- Definition Schedule of income tax expense benefit and effective income tax rate. + References No definition available. + Details
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Namespace Prefix: | gtn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration