BUSINESS ACQUISITIONS - Schedule of Purchase Price allocations of Acquisitions (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Nov. 05, 2022	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Purchase Price Allocation
Goodwill			$ 129,104	$ 132,717	$ 74,618
Contingent consideration arrangement adjustments			(800)	13,400	$ 2,500
Goodwill adjustments			(3,613)	(214)
Escrow deposit	$ 11,500
ReedTMS
Purchase Price
Cash consideration paid			116,989	116,989
Cash and cash equivalents acquired			(12,120)	(12,120)
Contingent consideration arrangement			4,200	5,000
Working capital surplus (deficiency)			(501)	(689)
Total purchase price (fair value of consideration)	108,600		108,568	109,180
Purchase Price Allocation
Current assets			52,580	52,531
Property and equipment			22,515	35,000
Intangible assets			27,300	12,000
Other non-current assets			7,926	7,927
Total assets acquired			110,321	107,458
Current liabilities			(45,886)	(45,497)
Other long-term liabilities			(5,095)	(5,622)
Total liabilities assumed			(50,981)	(51,119)
Goodwill			49,228	$ 52,841
Cash consideration paid adjustments			0
Cash and cash equivalents acquired adjustments			0
Contingent consideration arrangement adjustments			(800)
Working capital surplus (deficiency) adjustments			188
Total purchase price (fair value of consideration) adjustments			(612)
Current assets adjustments			49
Property and equipment adjustments			(12,485)
Intangible assets adjustments			15,300
Other non-current assets adjustments			(1)
Total assets acquired adjustments			2,863
Current liabilities adjustments			(389)
Other long-term liabilities adjustments			527
Total liabilities assumed adjustments			138
Goodwill adjustments			$ (3,613)
Net present value of future insurance payments	$ 900
Escrow post closing adjustments		$ 2,100
Indemnification escrow deposit		500
Letter of credit, seller obtained, company as beneficiary		$ 10,000