Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net earnings	$ 381,116	$ 244,793	$ 261,544
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation and amortization	97,493	60,344	32,400
Amortization of deferred loan costs	8,362	17,715	1,977
Provision for uncollectibles	287,427	139,274	21,947
Net (gain) loss on sale of long-lived assets	(12)	2,843	(1,468)
Net gain on deconsolidations	(36,694)	(3,411)	(2,237)
Share-based compensation	15,009	10,104	8,321
Excess tax benefit from share-based compensation	(4,001)	(3,177)	(7,247)
Deferred income taxes	19,037	30,780	38,363
Equity in earnings of unconsolidated affiliates	(16,152)	(7,038)	(3,151)
Debt extinguishment costs	0	4,536	0
Net change in fair value of contingent consideration	8,804	0	0
Increases (decreases) in cash and cash equivalents, net of acquisitions and dispositions:
Accounts receivable	(326,234)	(137,663)	(23,244)
Supplies inventory	(342)	(206)	132
Prepaid and other current assets	25,880	(9,091)	(5,308)
Accounts payable	3,131	(8,440)	441
Accrued expenses and other liabilities	66,600	66,175	6,693
Other, net	8,535	4,833	3,661
Net cash flows provided by operating activities	537,959	412,371	332,824
Cash flows from investing activities:
Acquisitions and related expenses	(962,689)	(2,184,058)	(73,594)
Acquisition of property and equipment	(60,305)	(40,217)	(28,856)
Proceeds from sale of interests in surgery centers	7,114	7,069	3,553
Purchases of marketable securities	(3,984)	(6,474)	0
Maturities of marketable securities	4,233	3,486	0
Other	(1,194)	(4,941)	159
Net cash flows used in investing activities	(1,016,825)	(2,225,135)	(98,738)
Cash flows from financing activities:
Proceeds from long-term borrowings and revolving credit facility	560,133	2,048,958	162,204
Repayment on long-term borrowings and revolving credit facility	(392,586)	(408,475)	(202,083)
Distributions to noncontrolling interests	(214,899)	(190,097)	(184,149)
Proceeds from preferred stock offering	0	172,500	0
Proceeds from common stock offering	466,777	439,875	0
Proceeds from issuance of common stock upon exercise of stock options	2,584	2,630	33,349
Repurchase of common stock	(3,684)	(4,615)	(45,964)
Payments of equity issuance costs	(19,058)	(24,494)	0
Financing costs incurred	(1,111)	(65,811)	(1,322)
Other	(20,709)	(468)	8,321
Net cash flows provided by (used in) financing activities	377,447	1,970,003	(229,644)
Net increase (decrease) in cash and cash equivalents	(101,419)	157,239	4,442
Cash and cash equivalents, beginning of period	208,079	50,840	46,398
Cash and cash equivalents, end of period	106,660	208,079	50,840
Supplemental cash flow information:
Interest payments	112,678	38,129	28,378
Income tax payments, net of refunds	$ 74,602	$ 19,224	$ 7,756