Segment Information - Additional Information (Detail)	3 Months Ended
Jun. 30, 2013 Agencies
Segment Reporting [Abstract]
Number of care centers available for sale	34
Number of care centers sold	3

Number of care centers that were classified as available for sale during the period.

No definition available.

Name:	amed_NumberOfCareCentersAvailableForSale
Namespace Prefix:	amed_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration