SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Debt Issuance Costs and Capitalized Interest (Details) - USD ($)		3 Months Ended	12 Months Ended
	Aug. 31, 2020	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Issuance Costs
Debt issuance costs, net of amortization			$ 300,000
Amortization of deferred loan costs			1,541,000	$ 990,000	$ 764,000
Capitalized Interest
Capitalized interest			$ 0	$ 0	$ 6,800,000
Capitalized interest, related to the Monarch Black Hawk expansion project		$ 16,500,000
Revolving Credit Facility
Debt Issuance Costs
Unamortized debt issuance cost	$ 476,000
Amortization of deferred loan costs	$ 95,000