Unaudited Summarized Quarterly Financial Information - Unaudited Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net service revenue	$ 218,993	$ 204,122	$ 200,172	$ 193,079	$ 193,371	$ 187,713	$ 188,867	$ 163,681	$ 816,366	$ 733,632	$ 658,283
Gross margin	90,053	83,249	83,533	78,653	80,579	74,591	77,340	66,347	335,488	298,857	274,819
Net Income Attributable to LHC Group Inc.'s Common Stockholders	$ 7,735	$ 8,845	$ 8,950	$ 6,805	$ 5,534	$ 6,174	$ 6,061	$ 4,068	$ 32,335	$ 21,837	$ 22,342
Earnings Per Share - Basic:
Net income attributable to LHC Group, Inc.' common stockholders	$ 0.44	$ 0.51	$ 0.51	$ 0.39	$ 0.32	$ 0.36	$ 0.35	$ 0.24	$ 1.86	$ 1.27	$ 1.31
Earnings Per Share, Diluted [Abstract]
Net income attributable to LHC Group, Inc.' common stockholders	$ 0.44	$ 0.50	$ 0.51	$ 0.39	$ 0.32	$ 0.36	$ 0.35	$ 0.24	$ 1.84	$ 1.26	$ 1.30
Weighted Average Shares Outstanding:
Basic	17,447,691	17,436,731	17,410,971	17,322,791	17,274,677	17,260,078	17,233,264	17,148,043	17,405,379	17,229,026	17,049,794
Diluted	17,647,483	17,610,953	17,529,100	17,489,483	17,419,423	17,356,916	17,277,224	17,268,716	17,547,531	17,315,333	17,132,751