Subsequent Events - Additional Information (Detail) (USD $)	6 Months Ended	1 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Aug. 08, 2013 Subsequent Event Acute Care Hospitals	Jul. 18, 2013 Subsequent Event Esplanade Rehab Hospital
Subsequent Event [Line Items]
Payments to acquire hospitals			$ 283,300,000
Payments to acquire real estate	$ 75,000,000	$ 396,500,000		$ 15,800,000

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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