Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net earnings	$ 68,755us-gaap_ProfitLoss	$ 60,114us-gaap_ProfitLoss
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation and amortization	22,818us-gaap_DepreciationAndAmortization	8,259us-gaap_DepreciationAndAmortization
Amortization of deferred loan costs	2,074	498
Provision for uncollectibles	73,999us-gaap_ProvisionForDoubtfulAccounts	5,216us-gaap_ProvisionForDoubtfulAccounts
Net loss on sale of long-lived assets	0us-gaap_GainLossOnDispositionOfAssets	604us-gaap_GainLossOnDispositionOfAssets
Loss (gain) on deconsolidation	223us-gaap_DeconsolidationGainOrLossAmount	(2,045)us-gaap_DeconsolidationGainOrLossAmount
Share-based compensation	3,709	2,458
Excess tax benefit from share-based compensation	(3,317)	(1,727)
Deferred income taxes	3,334us-gaap_DeferredIncomeTaxExpenseBenefit	11,933us-gaap_DeferredIncomeTaxExpenseBenefit
Equity in earnings of unconsolidated affiliates	(2,651)	(764)
Increases (decreases) in cash and cash equivalents, net of acquisitions and dispositions:
Accounts receivable	(74,214)	(6,867)
Supplies inventory	(30)us-gaap_IncreaseDecreaseInInventories	(245)us-gaap_IncreaseDecreaseInInventories
Prepaid and other current assets	13,842	(3,638)
Accounts payable	(2,526)	(3,578)
Accrued expenses and other liabilities	(7,886)	(606)
Other, net	697	207
Net cash flows provided by operating activities	98,827	69,819
Cash flows from investing activities:
Acquisitions and related expenses	(126,578)	(5,038)
Acquisition of property and equipment	(14,783)	(7,038)
Proceeds from sale of interests in surgery centers	0	1,111
Other	(220)	(418)
Net cash flows used in investing activities	(141,581)	(11,383)
Cash flows from financing activities:
Proceeds from long-term borrowings	2,227	31,945
Repayment on long-term borrowings	(5,213)us-gaap_RepaymentsOfLongTermDebt	(50,853)us-gaap_RepaymentsOfLongTermDebt
Distributions to noncontrolling interests	(47,202)us-gaap_PaymentsToMinorityShareholders	(43,194)us-gaap_PaymentsToMinorityShareholders
Cash dividends for preferred shares	(2,264)	0
Proceeds from issuance of common stock upon exercise of stock options	1,746	488
Repurchase of common stock	(3,684)	(2,857)
Excess tax benefit from share-based compensation	3,317	1,727
Other	1,904	584
Net cash flows used in financing activities	(49,169)	(62,160)
Net decrease in cash and cash equivalents	(91,923)	(3,724)
Cash and cash equivalents, beginning of period	208,079	50,840
Cash and cash equivalents, end of period	116,156	47,116
Supplemental cash flow information:
Interest payments	40,043us-gaap_InterestPaid	3,132us-gaap_InterestPaid
Income tax paid (received)	$ (88)us-gaap_IncomeTaxesPaidNet	$ 65us-gaap_IncomeTaxesPaidNet

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4K

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Section 45

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

-Paragraph 1A

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-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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Balance Type:	credit
Period Type:	duration

- Details

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