Revenue Recognition (Details) - Concentration Risk Type [Domain] - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Revenue, Major Customer [Line Items]
Provision for uncollectibles					$ (144,514)		$ (10,736)
Net revenue		$ 641,950		$ 278,227	$ 1,212,395		$ 537,788
Ambulatory Services [Member]
Revenue, Major Customer [Line Items]
Percentage of revenues from governmental healthcare programs					26.00%		25.00%
Net revenue		310,991		278,227	$ 594,901		$ 537,788
Physician Services [Member]
Revenue, Major Customer [Line Items]
Net fee for service revenue	[1]	365,044			688,342
Contract and other revenue	[1]	31,698			62,687
Provision for uncollectibles		(65,783)		0	(133,535)		0
Net revenue		330,959	[1]	$ 0	617,494	[1]	$ 0
Medicare [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Net fee for service revenue	[1]	43,224			81,397
Medicaid [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Net fee for service revenue	[1]	15,890			29,862
Commercial and Managed Care [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Net fee for service revenue	[1]	250,163			462,190
Self-Pay [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Net fee for service revenue	[1]	$ 55,767			$ 114,893
Sales Revenue, Net [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	100.00%			100.00%
Health Care Organization, Patient Service Revenue [Member] | Sales Revenue, Net [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over		110.30%			111.50%	[1]
Health Care Organization, Patient Service Revenue [Member] | Sales Revenue, Net [Member] | Medicare [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	13.10%			13.20%
Health Care Organization, Patient Service Revenue [Member] | Sales Revenue, Net [Member] | Medicaid [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	4.80%			4.80%
Health Care Organization, Patient Service Revenue [Member] | Sales Revenue, Net [Member] | Commercial and Managed Care [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	75.60%			74.80%
Health Care Organization, Patient Service Revenue [Member] | Sales Revenue, Net [Member] | Self-Pay [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	16.90%			18.60%
Contract and Other Revenue [Member] | Sales Revenue, Net [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	9.60%			10.20%
Provision for Uncollectibles [Member] | Sales Revenue, Net [Member] | Physician Services [Member]
Revenue, Major Customer [Line Items]
Percent of net revenue, over	[1]	(19.90%)			(21.60%)

[1] On July 16, 2014, we completed the acquisition of Sheridan. As such, historical amounts for periods prior to that date are not included.