SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Balances Related to Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 143,000	$ 134,200
Less accumulated depreciation	(100,890)	(92,422)
Property and equipment, net	42,108	41,845
Building and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,400	11,000
Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	38,700	40,000
Finance Leases [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	51,000	39,800
Property and equipment, net	29,100	28,600
Computer Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 39,900	$ 43,400