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Discontinued Operations, Exit Activities, and Clinic Obligations (Narrative) (Detail) - store	1 Months Ended		12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2015
Discontinued Operations, Exit Activities, and Clinic Obligations [Abstract]
Corporate Centers Sold During Period	17	24	41
Corporate Centers Closed During Period			34

X

- Definition

Number of corporate centers closed during the reporting period.

+ References

No definition available.

+ Details

Name:	med_CorporateCentersClosedDuringPeriod
Namespace Prefix:	med_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of corporate centers sold during the reporting period.

+ References

No definition available.

+ Details

Name:	med_CorporateCentersSoldDuringPeriod
Namespace Prefix:	med_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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