ACCOUNTS RECEIVABLE, NET - Schedule of Allowance for Doubtful Accounts and Expected Credit Losses (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Allowance for expected credit losses:
Balance at Beginning of Period	$ 5,581	$ 4,472	$ 4,472
Charged to Expenses	615	$ 1,066	2,229
Deductions Note	760		1,120
Balance at End of Period	$ 5,436		$ 5,581