SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Long-term Notes Receivable (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Oct. 13, 2021 GBP (£)	Oct. 13, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest income, other	$ 0	$ 70	$ 146	$ 221
Financing Receivable, after Allowance for Credit Loss, Noncurrent	3,800		3,800			£ 2,950,000	$ 4,000
Interest receivable	515		515
Financing Receivable, Allowance for Credit Loss, Writeoff			2,300
Other Noncurrent Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, after Allowance for Credit Loss	$ 2,000		$ 2,000		$ 3,900
Unsecured Debt
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest rate						8.00%	8.00%