Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Computation of earnings per share - USPH shareholders [Abstract]
Net income attributable to USPH shareholders	$ 28,239	$ 32,158	$ 40,831
Charges to retained earnings [Abstract]
Revaluation of redeemable non-controlling interest	(13,565)	(3,890)	(13,011)
Tax effect at statutory rate (federal and state)	3,466	994	3,324
Net income attributable to common shareholders	$ 18,140	$ 29,262	$ 31,144
Earnings per share basic (in dollars per share)	$ 1.28	$ 2.25	$ 2.41
Earnings per share diluted (in dollars per share)	$ 1.28	$ 2.25	$ 2.41
Shares used in computation [Abstract]
Basic earnings per share - weighted-average shares (in shares)	14,188	12,985	12,898
Diluted earnings per share - weighted-average shares (in shares)	14,188	12,985	12,898