Basis of Presentation (Details)	Jun. 30, 2014 center
Ownership Interests [Line Items]
Number Of Centers Owned Less Than 51 Percent	8
Consolidated [Member]
Ownership Interests [Line Items]
Number Of Centers Owned Less Than 51 Percent	1
Nonconsolidated [Member]
Ownership Interests [Line Items]
Number Of Centers Owned Less Than 51 Percent	7