CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (38,606)	$ (98,487)
Amortization and recognition of unrecognized pension cost components, net of income taxes	49	114
Comprehensive income (loss)	(38,557)	(98,373)
Less: Comprehensive income (loss) attributable to noncontrolling interests	400	481
Comprehensive income (loss) attributable to Quorum Health Corporation	$ (38,957)	$ (98,854)