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Note 3 - Stockholders' Equity (Details) (USD $) | 3 Months Ended | 1 Months Ended |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
Note 3 - Stockholders' Equity (Details) [Line Items] |  |  |
Proceeds from Issuance of Common Stock (in Dollars) | $ 167,528,000 us-gaap_ProceedsFromIssuanceOfCommonStock |  |
Capital Units, Authorized | 135,000,000 us-gaap_CapitalUnitsAuthorized | 135,000,000 us-gaap_CapitalUnitsAuthorized |
Common Stock, Shares Authorized | 100,000,000 us-gaap_CommonStockSharesAuthorized | 100,000,000 us-gaap_CommonStockSharesAuthorized | 100,000,000 us-gaap_CommonStockSharesAuthorized
Common Stock, Voting Rights, Votes Per Share | 1 gtn_CommonStockVotingRightsVotesPerShare | 1 gtn_CommonStockVotingRightsVotesPerShare |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased | 5,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased | 5,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased |
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 279,200 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased | 279,200 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased |
Common Stock, Capital Shares Reserved for Future Issuance | 6,965,301 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance | 6,965,301 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance | 7,116,171 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Class A [Member] |  |  |
Note 3 - Stockholders' Equity (Details) [Line Items] |  |  |
Common Stock, Shares Authorized | 15,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 15,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 15,000,000 us-gaap_CommonStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Common Stock, Voting Rights, Votes Per Share | 10 gtn_CommonStockVotingRightsVotesPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10 gtn_CommonStockVotingRightsVotesPerShare / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember |
Common Stock, Capital Shares Reserved for Future Issuance | 476,193 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 476,193 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 763,706 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Blank Check Preferred Stock [Member] |  |  |
Note 3 - Stockholders' Equity (Details) [Line Items] |  |  |
Preferred Stock, Shares Authorized | 20,000,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = gtn_BlankCheckPreferredStockMember | 20,000,000 us-gaap_PreferredStockSharesAuthorized / us-gaap_StatementClassOfStockAxis = gtn_BlankCheckPreferredStockMember |
Underwritten Offering [Member] |  |  |
Note 3 - Stockholders' Equity (Details) [Line Items] |  |  |
Stock Issued During Period, Shares, New Issues |  | 13,500,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_PlanNameAxis = gtn_UnderwrittenOfferingMember |
Share Price (in Dollars per share) | $ 13.00 us-gaap_SharePrice / us-gaap_PlanNameAxis = gtn_UnderwrittenOfferingMember | $ 13.00 us-gaap_SharePrice / us-gaap_PlanNameAxis = gtn_UnderwrittenOfferingMember |
Proceeds from Issuance of Common Stock (in Dollars) |  | 167,500,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_PlanNameAxis = gtn_UnderwrittenOfferingMember |
Issuance of Stock, Underwriting Discount (in Dollars) |  | 7,500,000 gtn_IssuanceOfStockUnderwritingDiscount / us-gaap_PlanNameAxis = gtn_UnderwrittenOfferingMember |
Issuance of Stock, Underwriting Expenses (in Dollars) |  | $ 700,000 gtn_IssuanceOfStockUnderwritingExpenses / us-gaap_PlanNameAxis = gtn_UnderwrittenOfferingMember |

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- Definition With regard to the voting rights of a particular class of common stock, represents the number of votes per share to which shareholders are entitled. + References No definition available. + Details
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- Definition Number of authorized capital units or capital shares. This element is relevant to issuers of face-amount certificates and registered investment companies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(a)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + 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 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 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 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 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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