Segment Reporting (Details) $ in Thousands	3 Months Ended								6 Months Ended		12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2014 USD ($) segment	Jul. 15, 2014 segment	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment									2	1
Segment Reporting Information [Line Items]
Net revenue	$ 704,262	$ 650,227	$ 641,950	$ 570,445	$ 581,811	$ 502,350	$ 278,227	$ 259,561			$ 2,566,884	$ 1,621,949	$ 1,057,196
Adjusted EBITDA											492,260	304,482	187,972
Earnings from continuing operations attributable to noncontrolling interests											218,181	190,809	183,484
Interest expense, net											(121,586)	(83,285)	(29,525)
Depreciation and amortization											(97,493)	(60,344)	(32,400)
Share-based compensation											(15,009)	(10,104)	(8,321)
Net change in fair value of contingent consideration											(8,804)	0	0
Transaction costs						(25,100)					(8,324)	(33,890)	(300)
Debt extinguishment costs											0	(16,887)	0
Net gain on deconsolidations											36,694	3,411	2,237
Earnings from continuing operations before income taxes	161,178	$ 135,797	$ 115,940	$ 83,004	101,535	$ 39,142	$ 80,487	$ 73,028			495,919	294,192	303,147
Acquisition and Capital Expenditures											1,022,994	110,065	102,450
Assets	6,546,482				5,501,062				$ 5,501,062		6,546,482	5,501,062
Ambulatory Services [Member]
Segment Reporting Information [Line Items]
Net revenue											1,230,050	1,109,935	1,057,196
Adjusted EBITDA											226,229	197,377	187,972
Acquisition and Capital Expenditures											168,593	81,156	102,450
Assets	2,609,479				2,526,625				2,526,625		2,609,479	2,526,625
Physician Services [Member]
Segment Reporting Information [Line Items]
Net revenue									512,014		1,336,834	512,014	0
Adjusted EBITDA											266,031	107,105	0
Net change in fair value of contingent consideration											(10,000)
Acquisition and Capital Expenditures											854,401	28,909	$ 0
Assets	$ 3,937,003				$ 2,974,437				$ 2,974,437		$ 3,937,003	$ 2,974,437