GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Amount of goodwill recorded	$ 25,111	$ 25,111
Amortization expense	200	100	$ 500
Monarch Casino Resort Spa Black Hawk, Inc.
Business Acquisition [Line Items]
Amount of goodwill recorded	$ 25,100	$ 25,100
Cloud Computing Arrangement (CCA)
Business Acquisition [Line Items]
Finite-lived intangible assets, Amortized period	5 years