XML 87 R73.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Note 11 - Retirement Plans - Target Asset Allocation (Details) | Dec. 31, 2023
--- | ---
Large Cap Blend [Member] |
Target range | 27.00%
Large Cap Blend [Member] | Minimum [Member] |
Target range | 0.00%
Large Cap Blend [Member] | Maximum [Member] |
Target range | 50.00%
Mid-cap Blend [Member] |
Target range | 10.00%
Mid-cap Blend [Member] | Minimum [Member] |
Target range | 0.00%
Mid-cap Blend [Member] | Maximum [Member] |
Target range | 40.00%
Small Cap Blend [Member] |
Target range | 6.00%
Small Cap Blend [Member] | Minimum [Member] |
Target range | 0.00%
Small Cap Blend [Member] | Maximum [Member] |
Target range | 25.00%
Foreign Large Blend [Member] |
Target range | 11.00%
Foreign Large Blend [Member] | Minimum [Member] |
Target range | 0.00%
Foreign Large Blend [Member] | Maximum [Member] |
Target range | 40.00%
Emerging Markets [Member] |
Target range | 3.00%
Emerging Markets [Member] | Minimum [Member] |
Target range | 0.00%
Emerging Markets [Member] | Maximum [Member] |
Target range | 25.00%
Real Estate [Member] |
Target range | 3.00%
Real Estate [Member] | Minimum [Member] |
Target range | 0.00%
Real Estate [Member] | Maximum [Member] |
Target range | 20.00%
US Treasury Securities [Member] |
Target range | 3.50%
US Treasury Securities [Member] | Minimum [Member] |
Target range | 0.00%
US Treasury Securities [Member] | Maximum [Member] |
Target range | 25.00%
Intermediate Core Plus Bond [Member] |
Target range | 25.00%
Intermediate Core Plus Bond [Member] | Minimum [Member] |
Target range | 0.00%
Intermediate Core Plus Bond [Member] | Maximum [Member] |
Target range | 50.00%
Short-term Bond [Member] |
Target range | 3.00%
Short-term Bond [Member] | Minimum [Member] |
Target range | 0.00%
Short-term Bond [Member] | Maximum [Member] |
Target range | 25.00%
Bank Loan [Member] |
Target range | 0.00%
Bank Loan [Member] | Minimum [Member] |
Target range | 0.00%
Bank Loan [Member] | Maximum [Member] |
Target range | 25.00%
High Yield Bond [Member] |
Target range | 4.00%
High Yield Bond [Member] | Minimum [Member] |
Target range | 0.00%
High Yield Bond [Member] | Maximum [Member] |
Target range | 25.00%
Emerging Markets Bond [Member] |
Target range | 3.00%
Emerging Markets Bond [Member] | Minimum [Member] |
Target range | 0.00%
Emerging Markets Bond [Member] | Maximum [Member] |
Target range | 20.00%
Money Market Funds [Member] |
Target range | 1.50%
Money Market Funds [Member] | Minimum [Member] |
Target range | 0.00%
Money Market Funds [Member] | Maximum [Member] |
Target range | 100.00%

X
- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_LargeCapBlendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_MidCapBlendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_SmallCapBlendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_ForeignLargeBlendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_EmergingMarketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_IntermediateCorePlusBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_ShorttermBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_BankLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_HighYieldBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=gtn_EmergingMarketsBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |