Acquisitions and Divestitures (Details Textual) (USD $)	3 Months Ended								1 Months Ended		1 Months Ended		1 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012 Diagnostic Clinic of Longview [Member]	Mar. 31, 2012 Metro South Medical Center [Member]	Mar. 31, 2012 Moses Taylor Healthcare [Member]	Mar. 31, 2012 Mercy health partners [Member]	Mar. 31, 2012 Physician practices, clinics and other ancillary businesses [Member]	Mar. 31, 2012 Tomball Regional Hospital [Member]	Feb. 28, 2011 Oregon Healthcare Resources LLC [Member]	Jan. 31, 2011 Oregon Healthcare Resources LLC [Member]	Sep. 30, 2011 Southcrest and Claremore Hospital [Member]	Aug. 31, 2011 Southcrest and Claremore Hospital [Member]	Oct. 31, 2011 New Directions Health Systems LLC [Member]	Oct. 22, 2011 New Directions Health Systems LLC [Member]
Acquisitions and Divestitures (Textual) [Abstract]
Total cash consideration paid for business including net working capital			$ 52,300,000
Total Consideration of Assets for Business combination				39,300,000	151,100,000	150,800,000		192,000,000
Purchase price allocation to property and equipment							1,500,000
Cash consideration paid including working capital							5,900,000
Cash paid for working capital				(900,000)	9,200,000	(2,100,000)		17,500,000
Purchase price to net working capital							300,000
Assumed liabilities in business combination			12,000,000	12,100,000	12,100,000	12,300,000		15,900,000
Total Consideration			64,300,000	50,500,000	172,400,000	161,000,000		225,400,000
Purchase price allocation to Goodwill			41,800,000		55,200,000	43,100,000	4,100,000	32,400,000
Carrying amount of net assets including allocation of reporting unit goodwill										19,700,000		193,000,000		14,200,000
Cash consideration		14,583,000							14,600,000		154,200,000		900,000
Acquisitions and Divestitures (Additional) (Textual) [Abstract]
Acquisition costs related to prospective and closed acquisitions expensed	$ 4,300,000	$ 3,300,000