Insurance Matters (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 Lawsuit	Mar. 31, 2014	Dec. 31, 2014
Malpractice Insurance [Line Items]
Number of professional liability lawsuits	45
Cash expenditures for self-insured professional liability costs	$ 840,000	$ 1,088,000
Non-current receivables for workers' compensation policy	85,000		246,000
Other Insurance Industry Disclosures [Abstract]
Liability for workers compensation claims	449,000
Workers compensation insurance, non current receivable for excess premiums paid	1,501,000
Health insurance, maximum self-insured annual amount per individual	175,000
Liability for reported claims and estimates for incurred but unreported claims	1,152,000
Scheduled for trial or arbitration over next 12 months
Malpractice Insurance [Line Items]
Number of professional liability lawsuits	4
Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Liability for reported and estimated future claims	24,906,000
Prefunded deductible policy
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim	500,000
Other Insurance Industry Disclosures [Abstract]
Professional liability insurance, annual coverage limit per facility	3,000,000
SHC Risk Carriers, Inc | Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim	500,000
Annual sublimit per center	1,000,000
Maximum annual coverage	5,000,000
Unaffiliated Entities | Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Insurance policy coverage limits per claim	1,000,000
Annual sublimit per center	$ 3,000,000
Number of types of professional liability insurance policies	7