Insurance Matters (Details) (USD $)	9 Months Ended					9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013 Lawsuit	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013 Scheduled for trial or arbitration over next 12 months Lawsuit	Sep. 30, 2013 Professional malpractice liability insurance	Sep. 30, 2013 Prefunded deductible policy	Sep. 30, 2013 SHC Risk Carriers, Inc Professional malpractice liability insurance	Sep. 30, 2013 Unaffiliated Entities Professional malpractice liability insurance Insurance_Policy
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim						$ 500,000	$ 500,000	$ 1,000,000
Annual sublimit per center							1,000,000	3,000,000
Maximum annual coverage							5,000,000
Number of types of professional liability insurance policies								3
Liability for reported and estimated future claims					28,134,000
Number of professional liability lawsuits	53			3
Cash expenditures for self-insured professional liability costs	3,502,000	1,616,000
Non-current receivables for workers' compensation policy	650,000		1,238,000
Other Insurance Industry Disclosures [Abstract]
Professional liability insurance, annual coverage limit per facility						3,000,000
Liability for workers compensation claims	253,000
Workers compensation insurance, non current receivable for excess premiums paid	1,140,000
Health insurance, maximum self-insured annual amount per individual	175,000
Liability for reported claims and estimates for incurred but unreported claims	$ 834,000