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Other Noncurrent Liabilities and Redeemable/Noncontrolling Interests - Additional Information (Detail) (USD $)			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Acute Care Hospital Services Las Vegas, Nevada Facility	Sep. 30, 2014 Acute Care Hospital Services Washington, District of Columbia	Sep. 30, 2014 Acute Care Hospital Services Laredo, Texas	Sep. 30, 2014 Behavioral Health Services Philadelphia, Pennsylvania
Noncontrolling Interest [Line Items]
Percentage of noncontrolling, minority ownership interests held by outside owners			28.00%	20.00%	11.00%	20.00%
Number of facilities			5
Redeemable noncontrolling interests	$ 231,000,000	$ 218,000,000
Noncontrolling interest	$ 54,122,000	$ 50,250,000

As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

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