Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 209,070	$ 144,460
Other comprehensive income (loss):
Foreign currency translation adjustment	(10,346)	(39,201)
Other comprehensive income (loss) before tax	(10,346)	(39,201)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(1,466)	(2,108)
Total other comprehensive income (loss), net of tax	(8,880)	(37,093)
Comprehensive income	200,190	107,367
Less: Comprehensive income (loss) attributable to noncontrolling interests	(21)	2,423
Comprehensive income attributable to UHS	$ 200,211	$ 104,944