NOTES RECEIVABLE - Schedule of Student Notes Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Student notes receivable	$ 16,208	$ 18,023
Student Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Student notes receivable	63,351	62,791
Allowance for doubtful student notes receivable	(23,491)	(22,911)
Total student notes receivable, net of allowance	39,860	39,880
Less current portion, net of allowance	12,574	13,416
Student notes receivable – non-current	$ 27,286	$ 26,464