Insurance Matters (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) Lawsuit Insurance_Policy	Mar. 31, 2015 USD ($)
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | Lawsuit	52
Cash expenditures for self-insured professional liability costs	$ 613,000	$ 840,000
Other Insurance Industry Disclosures [Abstract]
Liability for workers compensation claims	209,000
Workers compensation insurance, non current receivable for excess premiums paid	1,009,000
Health insurance, maximum self-insured annual amount per individual	175,000
Liability for reported claims and estimates for incurred but unreported claims	$ 855,000
Scheduled for trial or arbitration over next 12 months
Malpractice Insurance [Line Items]
Number of professional liability lawsuits | Lawsuit	11
Professional malpractice liability insurance
Malpractice Insurance [Line Items]
Liability for reported and estimated future claims	$ 20,771,000
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 | Insurance_Policy	7