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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

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BUSINESS COMBINATIONS AND RELATED ACTIVITY - Additional Information4 (Details) $ in Thousands				12 Months Ended
	Sep. 01, 2023 USD ($) location center	Apr. 01, 2022 USD ($) center location	Sep. 01, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Aug. 31, 2021
Business Acquisition [Line Items]
Property and equipment, net				$ 604,401	$ 565,961
Goodwill				679,463	677,665	$ 513,820
Gain (loss) on disposition of property plant equipment				(2,187)	(2,529)	(1,246)
Sale to noncontrolling interests, net of taxes				2,236	6,623	11,610
Purchase of intangible assets				0	0	5,130
Tarzana Medical Center, LLC
Business Acquisition [Line Items]
Purchase of intangible assets			$ 5,200
Additional Paid-in Capital
Business Acquisition [Line Items]
Sale to noncontrolling interests, net of taxes			$ 4,200	$ 2,236	$ 6,623	$ 4,206
Frederick County Radiology, LLC
Business Acquisition [Line Items]
Economic interest		65.00%
Frederick County Radiology, LLC \| Additional Paid-in Capital
Business Acquisition [Line Items]
Gain (loss) on disposition of property plant equipment		$ 6,600
Los Angeles Imaging Group, LLC
Business Acquisition [Line Items]
Economic interest	65.00%
West Valley Imaging Group, LLC \| Subsidiaries
Business Acquisition [Line Items]
Noncontrolling interest, percent of ownership sold			24.90%
Proceeds from sale of interest in minority shareholders			$ 13,100
Noncontrolling interest, ownership percentage by parent			50.10%				75.00%
Frederick County Radiology, LLC
Business Acquisition [Line Items]
Number of centers contributed \| center		4
Frederick County Radiology, LLC
Business Acquisition [Line Items]
Number of location \| location		6
Frederick Health Hospital, Inc. \| Frederick County Radiology, LLC
Business Acquisition [Line Items]
Property and equipment, net		$ 8,400
Goodwill		$ 11,000
Minority partner ownership percent		35.00%
Frederick Health Hospital, Inc. \| Frederick County Radiology, LLC \| Fixed Assets
Business Acquisition [Line Items]
Property and equipment, net		$ 5,400
Frederick Health Hospital, Inc. \| Frederick County Radiology, LLC \| Medical equipment
Business Acquisition [Line Items]
Property and equipment, net		3,000
Frederick Health Hospital, Inc. \| Frederick County Radiology, LLC
Business Acquisition [Line Items]
Book value of RadNet joint venture interests		$ 11,100
Cedars Sinai Medical Center \| Los Angeles Imaging Group, LLC
Business Acquisition [Line Items]
Number of location \| location	3
Number of centers contributed \| center	3
Economic interest	35.00%
Limited partners' contributed capital	$ 5,900