SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Operating items, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Other operating items, net	$ 2,229	$ 812	$ 3,546	$ 1,566
Professional service fees	2,400		3,700	1,500
Litigation proceeds	$ 200		$ 200
Equipment, supplies and employee testing expenses directly attributable to the pandemic for reopening of the properties and incremental to normal operations				$ 100