EQUITY AWARDS - Schedule of Stock Option Activity (Parenthetical) (Details)	12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock dividend percentage	10.00%

Share Based Compensation Arrangement By Share Share based payment award options stock dividend percentage.

No definition available.

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Namespace Prefix:	gnty_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration