Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 219,375	$ 244,092	$ 753,721	$ 645,056
Other comprehensive income (loss):
Foreign currency translation adjustment	(9,121)	14,245	(23,184)	(18,280)
Other comprehensive income (loss) before tax	(9,121)	14,245	(23,184)	(18,280)
Income tax expense (benefit) related to items of other comprehensive income (loss)	109	302	(1,958)	(908)
Total other comprehensive income (loss), net of tax	(9,230)	13,943	(21,226)	(17,372)
Comprehensive income	210,145	258,035	732,495	627,684
Less: Comprehensive income attributable to noncontrolling interests	1,024	2,813	1,255	9,811
Comprehensive income attributable to UHS	$ 209,121	$ 255,222	$ 731,240	$ 617,873