Concentration of Risk - Additional Information (Detail)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Risks and Uncertainties [Abstract]
Percentage Of Net Service Revenue Accounted By Facility	22.70%	26.00%	28.50%

Percentage of net service revenue generated from Louisiana facilities.

No definition available.

Name:	lhcg_PercentageOfNetServiceRevenueAccountedByFacility
Namespace Prefix:	lhcg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant