Supplemental Cash Flow Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract]
Licenses capitalized pay for purchases of property, building and equipment	$ 2.6

Cash outflow occurred in prior years as a deposit for fixed assets. Fixed assets being put in use during current year.

No definition available.

Name:	lhcg_CapitalExpenditureIncurredButNotYetPaid
Namespace Prefix:	lhcg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration