REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenue	$ 28,924	$ 143,218	$ 138,072	$ 263,849
Gaming
Disaggregation of Revenue [Line Items]
Total revenue	23,767	100,234	99,603	191,102
Racing
Disaggregation of Revenue [Line Items]
Total revenue	176	3,783	3,133	6,723
Hotel
Disaggregation of Revenue [Line Items]
Total revenue	2,115	11,390	9,761	17,695
Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	1,670	18,801	16,986	32,312
Other
Disaggregation of Revenue [Line Items]
Total revenue	1,196	9,010	8,589	16,017
Rhode Island
Disaggregation of Revenue [Line Items]
Total revenue	3,954	82,856	60,233	168,980
Rhode Island | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	3,456	65,572	46,915	134,412
Rhode Island | Racing
Disaggregation of Revenue [Line Items]
Total revenue	0	1,155	503	2,146
Rhode Island | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	0	1,694	1,227	3,235
Rhode Island | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	121	8,308	6,371	17,400
Rhode Island | Other
Disaggregation of Revenue [Line Items]
Total revenue	377	6,127	5,217	11,787
Delaware
Disaggregation of Revenue [Line Items]
Total revenue	6,464	25,751	27,550	27,275
Delaware | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	5,743	13,906	17,614	14,875
Delaware | Racing
Disaggregation of Revenue [Line Items]
Total revenue	(92)	252	544	279
Delaware | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	247	4,192	2,837	4,336
Delaware | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	248	6,339	4,924	6,689
Delaware | Other
Disaggregation of Revenue [Line Items]
Total revenue	318	1,062	1,631	1,096
Biloxi
Disaggregation of Revenue [Line Items]
Total revenue	17,136	32,118	42,618	63,149
Biloxi | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	13,559	20,756	30,277	41,815
Biloxi | Racing
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Biloxi | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	1,868	5,504	5,697	10,124
Biloxi | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	1,222	4,152	5,046	8,221
Biloxi | Other
Disaggregation of Revenue [Line Items]
Total revenue	487	1,706	1,598	2,989
Other
Disaggregation of Revenue [Line Items]
Total revenue	1,370	2,493	7,671	4,445
Other | Gaming
Disaggregation of Revenue [Line Items]
Total revenue	1,009	0	4,797	0
Other | Racing
Disaggregation of Revenue [Line Items]
Total revenue	268	2,376	2,086	4,298
Other | Hotel
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Other | Food and beverage
Disaggregation of Revenue [Line Items]
Total revenue	79	2	645	2
Other | Other
Disaggregation of Revenue [Line Items]
Total revenue	$ 14	$ 115	$ 143	$ 145