BUSINESS COMBINATIONS AND RELATED ACTIVITY (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Feb. 01, 2023	Jan. 01, 2023
Business Acquisition [Line Items]
Goodwill	$ 694,292	$ 679,463
Business Acquisitions
Business Acquisition [Line Items]
Total Consideration	21,126
Property & Equipment	4,614
Right of Use Assets	10,408
Goodwill	16,156
Intangible Assets	300
Other Assets	56
Right of Use Liabilities	$ (10,408)
Grossman Imaging Center of CMH, LLC*
Business Acquisition [Line Items]
Total Consideration				$ 10,500
Property & Equipment				1,178
Right of Use Assets				6,404
Goodwill				9,016
Intangible Assets				250
Other Assets				56
Right of Use Liabilities				(6,404)
Providence Health System - Southern California*
Business Acquisition [Line Items]
Total Consideration				7,096
Property & Equipment				643
Right of Use Assets				3,441
Goodwill				6,453
Intangible Assets				0
Other Assets				0
Right of Use Liabilities				$ (3,441)
Antelope Valley Outpatient Imaging*
Business Acquisition [Line Items]
Total Consideration			$ 3,530
Property & Equipment			2,794
Right of Use Assets			563
Goodwill			687
Intangible Assets			50
Other Assets			0
Right of Use Liabilities			$ (563)