LEASES - Components of Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
LEASES [Abstract]
Amortization of leased assets	$ 1,670	$ 1,622
Total lease cost	25,679	23,865	$ 20,109
Selling, General and Administrative [Member]
LEASES [Abstract]
Operating Lease Cost	20,716	19,665	19,235
Variable lease cost	931	423	475
Educational Services and Facilities [Member]
LEASES [Abstract]
Amortization of leased assets	1,670	1,622	175
Interest Expense [Member]
LEASES [Abstract]
Interest on lease Liabilities	$ 2,362	$ 2,155	$ 224