REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 109,148	$ 120,631
Gaming
Disaggregation of Revenue [Line Items]
Total revenue	75,836	90,868
Racing
Disaggregation of Revenue [Line Items]
Total revenue	2,957	2,940
Hotel
Disaggregation of Revenue [Line Items]
Total revenue	7,646	6,305
Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	15,316	13,511
Other
Disaggregation of Revenue [Line Items]
Total revenue	7,393	7,007
Rhode Island
Disaggregation of Revenue [Line Items]
Total revenue	56,279	86,125
Rhode Island | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	43,459	68,839
Rhode Island | Racing
Disaggregation of Revenue [Line Items]
Total revenue	503	992
Rhode Island | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	1,227	1,541
Rhode Island | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	6,250	9,092
Rhode Island | Other
Disaggregation of Revenue [Line Items]
Total revenue	4,840	5,661
Delaware
Disaggregation of Revenue [Line Items]
Total revenue	21,086	1,525
Delaware | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	11,871	969
Delaware | Racing
Disaggregation of Revenue [Line Items]
Total revenue	636	27
Delaware | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	2,590	144
Delaware | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	4,676	350
Delaware | Other
Disaggregation of Revenue [Line Items]
Total revenue	1,313	35
Biloxi
Disaggregation of Revenue [Line Items]
Total revenue	25,482	31,032
Biloxi | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	16,718	21,060
Biloxi | Racing
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Biloxi | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	3,829	4,620
Biloxi | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	3,824	4,069
Biloxi | Other
Disaggregation of Revenue [Line Items]
Total revenue	1,111	1,283
Other
Disaggregation of Revenue [Line Items]
Total revenue	6,301	1,949
Other | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	3,788	0
Other | Racing
Disaggregation of Revenue [Line Items]
Total revenue	1,818	1,921
Other | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Other | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	566	0
Other | Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 129	$ 28