Unaudited Summarized Quarterly Financial Information - Unaudited Quarterly Results of Operations (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net service revenue	$ 193,371	$ 187,713	$ 188,867	$ 163,681	$ 165,280	$ 164,748	$ 166,302	$ 161,953	$ 733,632	$ 658,283	$ 637,569
Gross margin	80,579	74,591	77,340	66,347	70,039	66,782	69,293	68,705	298,857	274,819	271,817
Net Income Attributable to LHC Group Inc.'s Common Stockholders	$ 5,534	$ 6,174	$ 6,061	$ 4,068	$ 4,969	$ 5,297	$ 5,790	$ 6,286	$ 21,837	$ 22,342	$ 27,440
Earnings Per Share - Basic:
Net income attributable to LHC Group, Inc.' common stockholders	$ 0.32	$ 0.36	$ 0.35	$ 0.24	$ 0.29	$ 0.31	$ 0.34	$ 0.37	$ 1.27	$ 1.31	$ 1.54
Earnings Per Share, Diluted [Abstract]
Net income attributable to LHC Group, Inc.' common stockholders	$ 0.32	$ 0.36	$ 0.35	$ 0.24	$ 0.29	$ 0.31	$ 0.34	$ 0.37	$ 1.26	$ 1.30	$ 1.53
Weighted Average Shares Outstanding:
Basic	17,274,677	17,260,078	17,233,264	17,148,043	17,096,360	17,083,201	17,055,619	16,966,525	17,229,026	17,049,794	17,853,321
Diluted	17,419,423	17,356,916	17,277,224	17,268,716	17,228,499	17,182,013	17,127,017	17,073,543	17,315,333	17,132,751	17,899,195