COMMITMENTS AND CONTINGENCIES - Restricted Cash (Details) $ in Thousands		6 Months Ended
	Apr. 13, 2020 USD ($) hotel installment	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Restricted cash released	$ 1,600
Number of hotels to benefit from restricted cash | hotel	7
Restrict cash, borrowed reserve	$ 8,900
Borrowed reserve, number of payment installments | installment	10
Borrowed reserve, installment payment beginning period prior to renovation date	12 months
Borrowed reserve, lump sum payment period prior to renovation date	60 days
Borrowed reserve not obligated		$ 500
Restricted cash		$ 22,103	$ 18,177
Minimum
Loss Contingencies [Line Items]
Restricted cash reserve as percentage of hotel revenues		2.00%
Maximum
Loss Contingencies [Line Items]
Restricted cash reserve as percentage of hotel revenues		5.00%