Segment Information - Summary of segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net service revenue	$ 2,282,771	$ 2,219,622	$ 2,063,204
Cost of service revenue (excluding depreciation and amortization)	1,399,158	1,336,609	1,250,403
General and administrative expenses	764,239	696,435	632,847
Impairment of intangibles and other	10,854	937	1,849
Operating income	108,520	185,641	178,105
Interest expense	(31,311)	(4,338)	(4,129)
Income (loss) before income taxes and noncontrolling interests	77,209	181,303	173,976
Income tax expense (benefit)	16,961	37,687	36,043
Net income	60,248	143,616	137,933
Less net income (loss) attributable to noncontrolling interests	20,377	27,888	26,337
Net income attributable to LHC Group, Inc.’s common stockholders	39,871	115,728	111,596
Total assets	2,896,957	2,895,621	2,483,354
Home Health
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net service revenue	1,531,491	1,551,542	1,463,779
Cost of service revenue (excluding depreciation and amortization)	894,002	901,685	848,663
General and administrative expenses	521,184	501,132	464,568
Impairment of intangibles and other	6,295	937	1,249
Operating income	110,010	147,788	149,299
Interest expense	(21,979)	(3,103)	(2,856)
Income (loss) before income taxes and noncontrolling interests	88,031	144,685	146,443
Income tax expense (benefit)	21,144	30,089	30,435
Net income	66,887	114,596	116,008
Less net income (loss) attributable to noncontrolling interests	17,330	22,060	20,525
Net income attributable to LHC Group, Inc.’s common stockholders	49,557	92,536	95,483
Total assets	1,721,288	1,719,403	1,741,044
Hospice
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net service revenue	407,489	311,218	243,806
Cost of service revenue (excluding depreciation and amortization)	270,177	194,895	150,675
General and administrative expenses	129,237	89,693	66,454
Impairment of intangibles and other	2,727		600
Operating income	5,348	26,630	26,077
Interest expense	(4,553)	(529)	(469)
Income (loss) before income taxes and noncontrolling interests	795	26,101	25,608
Income tax expense (benefit)	(1,049)	5,344	4,925
Net income	1,844	20,757	20,683
Less net income (loss) attributable to noncontrolling interests	4,199	4,297	4,822
Net income attributable to LHC Group, Inc.’s common stockholders	(2,355)	16,460	15,861
Total assets	797,019	786,671	301,475
Home and Community-Based
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net service revenue	180,587	189,561	194,584
Cost of service revenue (excluding depreciation and amortization)	130,142	137,852	150,378
General and administrative expenses	48,230	46,724	45,443
Impairment of intangibles and other	1,832	0	0
Operating income	383	4,985	(1,237)
Interest expense	(2,832)	(413)	(390)
Income (loss) before income taxes and noncontrolling interests	(2,449)	4,572	(1,627)
Income tax expense (benefit)	(694)	1,069	(357)
Net income	(1,755)	3,503	(1,270)
Less net income (loss) attributable to noncontrolling interests	(130)	467	(171)
Net income attributable to LHC Group, Inc.’s common stockholders	(1,625)	3,036	(1,099)
Total assets	235,036	239,314	263,708
Facility-Based
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net service revenue	127,916	132,098	128,578
Cost of service revenue (excluding depreciation and amortization)	93,336	89,270	85,827
General and administrative expenses	48,073	45,304	43,435
Impairment of intangibles and other	0	0	0
Operating income	(13,493)	(2,476)	(684)
Interest expense	(1,327)	(208)	(297)
Income (loss) before income taxes and noncontrolling interests	(14,820)	(2,684)	(981)
Income tax expense (benefit)	(4,087)	(919)	(185)
Net income	(10,733)	(1,765)	(796)
Less net income (loss) attributable to noncontrolling interests	(1,172)	1,105	1,193
Net income attributable to LHC Group, Inc.’s common stockholders	(9,561)	(2,870)	(1,989)
Total assets	79,571	85,005	103,401
HCI
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Net service revenue	35,288	35,203	32,457
Cost of service revenue (excluding depreciation and amortization)	11,501	12,907	14,860
General and administrative expenses	17,515	13,582	12,947
Impairment of intangibles and other	0	0	0
Operating income	6,272	8,714	4,650
Interest expense	(620)	(85)	(117)
Income (loss) before income taxes and noncontrolling interests	5,652	8,629	4,533
Income tax expense (benefit)	1,647	2,104	1,225
Net income	4,005	6,525	3,308
Less net income (loss) attributable to noncontrolling interests	150	(41)	(32)
Net income attributable to LHC Group, Inc.’s common stockholders	3,855	6,566	3,340
Total assets	$ 64,043	$ 65,228	$ 73,726