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SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES - Changes in Allowance (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounts Receivable , Allowances for Credit Loss [Roll Forward]      
Balance at beginning of year $ 8,628 $ 8,929 $ 10,126
Charged to costs and expenses 67 1,194 139
Charged to other accounts 12 21 79
Deductions (948) (1,516) (1,415)
Balance at end of year $ 7,759 $ 8,628 $ 8,929