XML 41 R27.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Note 1 - Basis of Presentation (Details Textual) $ in Thousands |  |  |  | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 07, 2017 USD ($) | May 30, 2017 USD ($) | Jan. 17, 2017 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2019 USD ($) | Jan. 01, 2017 USD ($) | Dec. 31, 2016 USD ($)
Number of Reportable Segments |  |  |  | 1 |  |  |
Spectrum Auction Proceeds Receivable, Current |  | $ 90,800 |  | $ 90,824 |  |  |
Property, Plant and Equipment, Additions |  |  |  | $ 36,500 |  |  |
Period for Creating Allowance for Doubtful Accounts |  |  |  | 120 days |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  |  |  | 1,107
Subsequent Event [Member] |  |  |  |  |  |  |
Proceeds from Spectrum Auction | $ 90,800 |  |  |  |  |  |
Retained Earnings [Member] |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  |  |  | $ 1,107
Accounting Standards Update 2016-09 [Member] | Retained Earnings [Member] |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  |  | $ 1,100 |
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member] |  |  |  |  |  |  |
New Accounting Pronouncement Effect, Right of Use Assets |  |  |  |  | $ 13,200 |  |
New Accounting Pronouncement Effect, Lease Obligation Liability |  |  |  |  | $ 13,200 |  |
Consolidation, Eliminations [Member] |  |  |  |  |  |  |
Spectrum Auction Proceeds Receivable, Current |  |  |  | $ 90,800 |  |  |
Notes Payable, Current |  |  |  | 90,800 |  |  |
GME [Member] |  |  |  |  |  |  |
Variable Interest Entity, Financial or Other Support, Amount |  |  | $ 106,000 |  |  |  |
Consideration for Acquisition of Licenses from VIE, Debt Assumed |  | $ 59,000 |  |  |  |  |
Spectrum Auction Proceeds Receivable, Current |  |  |  | 90,824 |  |  |
Notes Payable, Current |  |  | 106,000 | $ 90,824 |  |  |
Green Bay Acquisition and Davenport Acquisition [Member] |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  | $ 269,900 |  |  |  |

X
- Definition The amount of debt assumed as consideration for the acquisition of licenses from a VIE. + References No definition available. + Details
Name: | gtn_ConsiderationForAcquisitionOfLicensesFromVIEDebtAssumed
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of effect of a change in accounting principle on lease obligation liability. + References No definition available. + Details
Name: | gtn_NewAccountingPronouncementEffectLeaseObligationLiability
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of effect of a change in accounting principle on right of use assets. + References No definition available. + Details
Name: | gtn_NewAccountingPronouncementEffectRightOfUseAssets
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period for creating allowance for doubtful accounts. + References No definition available. + Details
Name: | gtn_PeriodForCreatingAllowanceForDoubtfulAccounts
Namespace Prefix: | gtn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from spectrum auction. + References No definition available. + Details
Name: | gtn_ProceedsFromSpectrumAuction
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The carrying amount of proceeds receivable from a counter party, within one year of the balance sheet date (or normal operating cycle, whichever is longer) for spectrum auction. + References No definition available. + Details
Name: | gtn_SpectrumAuctionProceedsReceivableCurrent
Namespace Prefix: | gtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer. + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_NotesPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=77990344&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityFinancialOrOtherSupportAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201609Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201602Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConsolidationItemsAxis=us-gaap_ConsolidationEliminationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=gtn_GMEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=gtn_GreenBayAcquisitionAndDavenportAcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |