INCOME TAXES - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Accrued payroll & employee benefits	$ 14,100	$ 13,200
Workers’ compensation	10,600	10,500
Share-based compensation	5,700	6,200
Legal & compliance matters	4,700	6,200
Lease liability	27,800	27,300
Deferred social security taxes (1)	0	6,900
Net operating loss carryforwards	11,600	13,600
Tax credit carryforwards	2,900	2,500
Other assets	200	500
Gross deferred tax assets	77,600	86,900
Less: valuation allowance	(5,200)	(3,300)
Net deferred tax assets	72,400	83,600
Deferred tax liabilities:
Property and equipment	(6,600)	(8,100)
Amortization of intangible assets	(48,500)	(32,300)
Deferred revenue	0	(4,500)
Investment in partnerships	(10,000)	(10,800)
Right-of-use asset	(27,000)	(26,700)
Other liabilities	(700)	(900)
Gross deferred tax liabilities	(92,800)	(83,300)
Deferred Income Tax Liabilities, Net	(20,411)	0
Deferred income tax assets	$ 0	$ 289