SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Debt Issuance Costs & Debt Discount (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Issuance Costs & Debt Discount
Unamortized discount and debt issuance costs	$ 5,516	$ 6,657
Term Loan
Debt Issuance Costs & Debt Discount
Unamortized discount and debt issuance costs	5,500	6,700
Revolving Line of Credit
Debt Issuance Costs & Debt Discount
Unamortized debt issuance costs	$ 4,800	$ 5,300

Amount of unamortized debt discount (premium) and debt issuance costs.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant