ACQUISITION, INTEGRATION AND RESTRUCTURING EXPENSE (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Acquisition costs	$ 1,766,000		$ 6,878,000
Restructuring expense	20,000	$ 20,000	0
Total acquisition, integration and restructuring expense	1,786,000		6,878,000
Delaware Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expense	20,000
Restructuring Reserve	0	$ 23,000
Payments for Restructuring	43,000
Dover Downs merger and going public expenses
Restructuring Cost and Reserve [Line Items]
Acquisition costs	54,000		6,440,000
Black Hawk Casinos
Restructuring Cost and Reserve [Line Items]
Acquisition costs	600,000		400,000
Isle Kansas City and Lady Luck Vicksburg
Restructuring Cost and Reserve [Line Items]
Acquisition costs	438,000		0
Black Hawk, CO Properties
Restructuring Cost and Reserve [Line Items]
Acquisition costs	571,000		438,000
Bally's, Shreveport & Montbleu
Restructuring Cost and Reserve [Line Items]
Acquisition costs	$ 703,000		$ 0