Segment Information - Additional Information (Detail)	3 Months Ended	9 Months Ended
Sep. 30, 2013 Agencies	Jun. 30, 2013 Agencies	Sep. 30, 2013 Segments Agencies
Segment Reporting [Abstract]
Number of reportable business segments			2
Number of care centers available for sale		34	28
Number of care centers sold	0	3	3

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration