Item 5. Other Information (Details Textual) Pure in Thousands	3 Months Ended
Jun. 30, 2023
Issuer Rule 10b5-1, Number of Trading Agreements Adopted or Terminated by Directors or Executive Officers	0

Represents the number of directors or executive officers that adopted and/or terminated a trade agreement.

No definition available.

Name:	gtn_IssuerRule10b51NumberOfTradingAgreementsAdoptedOrTerminatedByDirectorsOrExecutiveOfficers
Namespace Prefix:	gtn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration