Debt Instrument, Current Variable Rate

No definition available.

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- Definition

Debt Instrument, Periodic Payment, Percent of Principal

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Variable Rate Floor

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Accordion Feature, Increase To Maximum Borrowing Capacity

+ References

No definition available.

+ Details

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- Definition

Percentage amount of principal that may be redeemed at stated redemption price.

+ References

No definition available.

+ Details

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- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

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-Publisher FASB
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-Name Regulation S-X (SX)
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-Section 02
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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

Amount of assets pledged to secure a debt instrument.

+ References

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Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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-Name Accounting Standards Codification
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-Paragraph 3
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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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- References

No definition available.

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- References

No definition available.

+ Details

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- Definition

Principal amount of long-term debt and capital lease obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Principal amount of long-term debt and capital lease obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Principal amount of long-term debt and capital lease obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Principal amount of long-term debt and capital lease obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Principal amount of long-term debt and capital lease obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Principal amount of long-term debt and capital lease obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- References

No definition available.

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Period Type:	duration

- Definition

The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- References

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Balance Type:	na
Period Type:	duration

- References

No definition available.

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Data Type:	na
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Long-Term Debt (Narrative) (Details) - USD ($)		12 Months Ended
Long-Term Debt (Narrative) (Details) - USD ($)	Jul. 16, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 21, 2015	Nov. 20, 2012	May. 28, 2010
Payments required on Company's long-term debt and capital leases
2016		$ 20,400,000
2017		18,000,000
2018		14,800,000
2019		187,000,000
2020		261,000,000
Thereafter		1,900,000,000
Term Loan and Credit Facility
Debt extinguishment costs		0	$ (16,887,000)	$ 0
Revolving Credit Facility [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, carrying value		175,000,000	0
Term Loan and Credit Facility
Remaining carrying value under revolving credit facility		325,000,000
Loans Payable [Member]
Other Debt
Book value of certain assets of surgery centers pledged as collateral		41,700,000
Fixed Interest Rate [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, carrying value		1,400,000,000
Long-term debt, fair value		1,400,000,000
Variable Interest Rate [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, carrying value		1,000,000,000
Long-term debt, fair value		1,000,000,000
5.625% Senior Unsecured Notes due 2020 [Member] \| Senior Notes [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, carrying value		250,000,000	250,000,000
Senior Unsecured Debt
Face amount						$ 250,000,000.0
Interest rate						5.625%
Senior Secured Debt
Face amount						$ 250,000,000.0
Interest rate						5.625%
5.625% Senior Unsecured Notes due 2022 [Member] \| Senior Notes [Member]
Schedule of Capitalization, Long-term Debt [Line Items]
Long-term debt, carrying value		$ 1,100,000,000	$ 1,100,000,000
Senior Unsecured Debt
Face amount	$ 1,100,000,000.0
Interest rate	5.625%
Redeemable principal percentage		35.00%
Senior Secured Debt
Face amount	$ 1,100,000,000.0
Interest rate	5.625%
8.04% Senior Secured Notes due 2020 [Member] \| Senior Notes [Member]
Senior Unsecured Debt
Face amount							$ 75,000,000.0
Senior Secured Debt
Face amount							$ 75,000,000.0
Early termination fee		$ 12,400,000
Period Prior to July 15, 2017 [Member] \| 5.625% Senior Unsecured Notes due 2022 [Member] \| Senior Notes [Member]
Senior Unsecured Debt
Redemption price as percent of the principal amount		105.625%
Senior Secured Credit Facility - Term Loan [Member]
Term Loan and Credit Facility
Borrowing capacity of new revolving credit agreement	$ 870,000,000.0
Quarterly principal payment as a percent of face amount	0.25%
Annual principal payment	$ 8,700,000
Revolving Credit Facility [Member]
Term Loan and Credit Facility
Borrowing capacity of new revolving credit agreement	$ 300,000,000.0				$ 500,000,000
Line of Credit Facility, Accordion Feature, Increase To Maximum Borrowing Capacity					$ 200,000,000
Unused commitment fee as a percent	0.375%
Debt extinguishment costs		$ 4,500,000
Base Rate [Member] \| Senior Secured Credit Facility - Term Loan [Member] \| Maximum [Member]
Term Loan and Credit Facility
Basis spread	2.00%
Base Rate [Member] \| Senior Secured Credit Facility - Term Loan [Member] \| Minimum [Member]
Term Loan and Credit Facility
Basis spread	1.75%
Base Rate [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Term Loan and Credit Facility
Basis spread	2.00%
Base Rate [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Term Loan and Credit Facility
Basis spread	1.75%
LIBOR [Member] \| Senior Secured Credit Facility - Term Loan [Member]
Term Loan and Credit Facility
Floor rate	0.75%
Current variable rate		3.75%
LIBOR [Member] \| Senior Secured Credit Facility - Term Loan [Member] \| Maximum [Member]
Term Loan and Credit Facility
Basis spread	3.00%
LIBOR [Member] \| Senior Secured Credit Facility - Term Loan [Member] \| Minimum [Member]
Term Loan and Credit Facility
Basis spread	2.75%
LIBOR [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Term Loan and Credit Facility
Basis spread	3.00%
LIBOR [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Term Loan and Credit Facility
Basis spread	2.75%