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Other Noncurrent Liabilities and Redeemable/Noncontrolling Interests - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2012
Acute Care Hospital Services
Las Vegas, Nevada
Facility
Jun. 30, 2012
Acute Care Hospital Services
Washington, District of Columbia
Jun. 30, 2012
Acute Care Hospital Services
Laredo, Texas
Jun. 30, 2012
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 $ 227 $ 218        
Noncontrolling interest $ 53 $ 51