Annual report pursuant to Section 13 and 15(d)

Reclassifications (Details)

v2.4.0.6
Reclassifications (Details) (Medical Costs [Member], Selling, General And Administrative Expenses [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Medical Costs [Member] | Selling, General And Administrative Expenses [Member]
     
Reclassifications [Line Items]      
Reclassification impact $ 96,830 $ 70,058 $ 66,608