REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation by Booking Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Total room revenues	$ 323,657	$ 336,501	$ 601,326	$ 634,268
Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues	311,614	326,948	578,660	617,158
Other Hotel Revenues
Disaggregation of Revenue [Line Items]
Total room revenues	6,100	5,500	11,400	10,800
Property direct | Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues	80,043	93,480	153,587	186,866
Central call center | Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues	78,091	79,202	143,628	147,665
Proprietary website | Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues	58,638	57,742	107,893	107,601
Third-party intermediaries | Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues	83,744	81,866	152,841	148,986
Travel agency global distribution systems | Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues	$ 11,098	14,658	$ 20,711	26,040
Restatement Adjustment | Third-party intermediaries | Room revenues
Disaggregation of Revenue [Line Items]
Total room revenues		$ 19,600		$ 36,000