XML 19 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6

Revenue Recognition (Narrative) (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Revenue Recognition [Abstract]
Unbilled revenue	$ 838,000	$ 720,000

Outstanding amount due for unbilled revenue at the end of the period.

No definition available.

Name:	che_UnbilledRevenue
Namespace Prefix:	che_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_RevenueRecognitionAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration