REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation by Booking Source (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 room and other hotel revenues	$ 230,834	$ 323,657	$ 497,135	$ 601,326
Room revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	219,851	311,614	474,315	578,660
Other Hotel Revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	6,300	6,100	13,100	11,400
Property direct | Room revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	59,830	75,426	119,854	145,255
Property direct | Room revenues | Restatement Adjustment
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues		(4,600)		(8,300)
Central call center | Room revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	70,840	81,089	148,031	149,197
Central call center | Room revenues | Restatement Adjustment
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues		3,000		5,600
Proprietary website | Room revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	46,643	60,257	99,582	110,655
Proprietary website | Room revenues | Restatement Adjustment
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues		1,600		2,700
Third-party intermediaries | Room revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	39,851	83,744	97,671	152,841
Travel agency global distribution systems | Room revenues
Disaggregation of Revenue [Line Items]
Total room and other hotel revenues	$ 2,687	$ 11,098	$ 9,177	$ 20,712