Acquisitions and Disposals - Summary of Unaudited Pro Forma Information in Combined Results of Operations (Detail) (Deaconess HomeCare, LLC, USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Deaconess HomeCare, LLC
Business Acquisition [Line Items]
Net service revenue	$ 557,802	$ 547,210
Net income attributable to LHC Group, Inc.’s common stockholders	$ 16,118	$ 18,120
Pro forma earnings per share, basic (per share)	$ 0.94	$ 1.06
Pro forma earnings per share, diluted (per share)	$ 0.93	$ 1.06