EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Computation of earnings per share - USPH shareholders [Abstract]
Net income attributable to USPH shareholders	$ 7,410	$ 8,799
Charges to retained earnings [Abstract]
Revaluation of redeemable non-controlling interest	119	(153)
Tax effect at statutory rate (federal and state)	(30)	39
Net income attributable to common shareholders	$ 7,499	$ 8,685
Earnings per share basic (in dollars per share)	$ 0.58	$ 0.67
Earnings per share diluted (in dollars per share)	$ 0.58	$ 0.67
Shares used in computation [Abstract]
Basic earnings per share - weighted-average shares (in shares)	13,025	12,937
Diluted earnings per share - weighted-average shares (in shares)	13,025	12,937