Cash Overdrafts And Cash Equivalents (Narrative) (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Cash Overdrafts And Cash Equivalents [Abstract]
Cash overdrafts included in accounts payable	$ 0	$ 9,800,000

Cash overdraft payable included in accounts payable.

No definition available.

Name:	che_CashOverdraftPayableIncludedInAccountsPayable
Namespace Prefix:	che_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant