REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues from Franchised and Managed Hotels (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 revenues	$ 230,834	$ 323,657	$ 497,135	$ 601,326
Management fees
Disaggregation of Revenue [Line Items]
Total revenues	208	367	443	660
Franchise fees
Disaggregation of Revenue [Line Items]
Total revenues	1,010	1,080	2,054	2,012
Indirect reimbursements (system service fees)
Disaggregation of Revenue [Line Items]
Total revenues	1,157	1,400	2,347	2,584
Direct reimbursements
Disaggregation of Revenue [Line Items]
Total revenues	2,288	3,126	4,888	6,037
Total revenues from franchised and managed hotels
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,663	$ 5,973	$ 9,732	$ 11,293