Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 325,276	$ 256,504	$ 534,346	$ 400,964
Other comprehensive income (loss):
Foreign currency translation adjustment	(3,717)	6,676	(14,063)	(32,525)
Other comprehensive income (loss) before tax	(3,717)	6,676	(14,063)	(32,525)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(601)	898	(2,067)	(1,210)
Total other comprehensive income (loss), net of tax	(3,116)	5,778	(11,996)	(31,315)
Comprehensive income	322,160	262,282	522,350	369,649
Less: Comprehensive income attributable to noncontrolling interests	252	4,575	231	6,998
Comprehensive income attributable to UHS	$ 321,908	$ 257,707	$ 522,119	$ 362,651