BUSINESS COMBINATIONS AND RELATED ACTIVITY - Schedule of Business Acquisitions Acquired Assets and Assumed Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Nov. 01, 2024	Oct. 07, 2024	Sep. 16, 2024	Sep. 01, 2024	Jun. 01, 2024	Apr. 01, 2024	Mar. 31, 2024	Feb. 01, 2024	Dec. 31, 2023	Aug. 01, 2023	Apr. 01, 2023	Feb. 01, 2023	Jan. 01, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Goodwill	$ 710,663									$ 679,463					$ 677,665
Business Acquisitions
Business Acquisition [Line Items]
Total Purchase Consideration	59,045									10,765
Property & Equipment	28,289									3,942
Right of Use Assets	25,709									8,173
Goodwill	34,697									6,473
Intangible Assets	2,565									300
Other	161									50
Right of Use Liabilities	(26,079)									$ (8,173)
Notes payable and other liabilities	$ (6,297)
Antelope Valley Outpatient Imaging
Business Acquisition [Line Items]
Total Purchase Consideration									$ 3,530
Property & Equipment									2,793
Right of Use Assets									563
Goodwill									687
Intangible Assets									50
Other									0
Right of Use Liabilities									(563)
Notes payable and other liabilities									$ 0
Grossman Imaging Center Of CMH, LLC
Business Acquisition [Line Items]
Total Purchase Consideration								$ 10,343
Property & Equipment								1,717
Right of Use Assets								6,304
Goodwill								8,500
Intangible Assets								280
Other								56
Right of Use Liabilities								(6,514)
Notes payable and other liabilities								0
Providence Health System Southern California
Business Acquisition [Line Items]
Total Purchase Consideration								7,369
Property & Equipment								1,378
Right of Use Assets								3,441
Goodwill								5,991
Intangible Assets								0
Other								0
Right of Use Liabilities								(3,441)
Notes payable and other liabilities								$ 0
Houston Medical Imaging, LLC
Business Acquisition [Line Items]
Total Purchase Consideration							$ 22,703
Property & Equipment							15,826
Right of Use Assets							7,929
Goodwill							11,584
Intangible Assets							1,660
Other							90
Right of Use Liabilities							(8,089)
Notes payable and other liabilities							$ (6,297)
U.S. Imaging, Inc
Business Acquisition [Line Items]
Total Purchase Consideration						$ 4,200
Property & Equipment						4,025
Right of Use Assets						5,597
Goodwill						0
Intangible Assets						175
Other						0
Right of Use Liabilities						(5,597)
Notes payable and other liabilities						$ 0
Global Imaging LLP
Business Acquisition [Line Items]
Total Purchase Consideration					$ 2,900
Property & Equipment					1,266
Right of Use Assets					0
Goodwill					1,584
Intangible Assets					50
Other					0
Right of Use Liabilities					0
Notes payable and other liabilities					$ 0
Stanislaus Surgical Hospital, LLC
Business Acquisition [Line Items]
Total Purchase Consideration				$ 3,000
Property & Equipment				503
Right of Use Assets				1,468
Goodwill				2,382
Intangible Assets				100
Other				15
Right of Use Liabilities				(1,468)
Notes payable and other liabilities				$ 0
Pink Perception, LLC
Business Acquisition [Line Items]
Total Purchase Consideration			$ 4,000
Property & Equipment			494
Right of Use Assets			407
Goodwill			3,306
Intangible Assets			200
Other			0
Right of Use Liabilities			(407)
Notes payable and other liabilities			$ 0
AV Imaging PLLC
Business Acquisition [Line Items]
Total Purchase Consideration		$ 1,000
Property & Equipment		287
Right of Use Assets		0
Goodwill		663
Intangible Assets		50
Other		0
Right of Use Liabilities		0
Notes payable and other liabilities		$ 0
C.C.D.G.L.R. & S Services Inc.
Business Acquisition [Line Items]
Total Purchase Consideration														$ 3,500
Property & Equipment														435
Right of Use Assets														1,689
Goodwill														3,015
Intangible Assets														50
Other														0
Right of Use Liabilities														(1,689)
Southern California Diagnostic Imaging, Inc.
Business Acquisition [Line Items]
Total Purchase Consideration														1,815
Property & Equipment														466
Right of Use Assets														1,184
Goodwill														1,272
Intangible Assets														50
Other														27
Right of Use Liabilities														$ (1,184)
Inglewood Imaging Center, LLC
Business Acquisition [Line Items]
Total Purchase Consideration													$ 2,600
Property & Equipment													877
Right of Use Assets													1,188
Goodwill													1,658
Intangible Assets													50
Other													15
Right of Use Liabilities													(1,188)
Ramapo Radiology Associates, P.C.
Business Acquisition [Line Items]
Total Purchase Consideration													2,000
Property & Equipment													1,663
Right of Use Assets													3,775
Goodwill													229
Intangible Assets													100
Other													8
Right of Use Liabilities													$ (3,775)
Madison Radiology Medical Group, Inc.
Business Acquisition [Line Items]
Total Purchase Consideration												$ 250
Property & Equipment												100
Right of Use Assets												0
Goodwill												150
Intangible Assets												0
Other												0
Right of Use Liabilities												$ 0
Delaware Diagnostic Imaging, P.A.
Business Acquisition [Line Items]
Total Purchase Consideration											$ 600
Property & Equipment											401
Right of Use Assets											337
Goodwill											149
Intangible Assets											50
Other											0
Right of Use Liabilities											$ (337)