NOTES RECEIVABLE - Schedule of Student Notes Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Student notes receivable	$ 39,095	$ 16,208
Student Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Student notes receivable	64,956	63,351
Allowance for doubtful student notes receivable	(22,702)	(23,491)
Total student notes receivable, net of allowance	42,254	39,860
Less current portion, net of allowance	13,705	12,574
Student notes receivable – non-current	$ 28,549	$ 27,286