ACQUISITIONS AND DIVESTITURES (Details) - Conviva	3 Months Ended
	Mar. 31, 2021 health_center employee affiliate_practice
Business Acquisition [Line Items]
Number of new centers acquired | health_center	12
New team members from acquisition	200
Physicians, physician assistants and advanced practice registered nurses from acquisition	40
Number of affiliate practices added to network | affiliate_practice	49