Intangible Assets (Details 3) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Goodwill
Balance at the beginning of the period	$ 1,631,716
Other	(333)
Goodwill acquired during the period	78
Balance at the end of the period	1,631,461
Specialty Hospitals
Goodwill
Balance at the beginning of the period	1,333,553
Other	(333)
Balance at the end of the period	1,333,220
Outpatient Rehabilitation
Goodwill
Balance at the beginning of the period	298,163
Goodwill acquired during the period	78
Balance at the end of the period	$ 298,241