Annual report pursuant to Section 13 and 15(d)

Medical Claims Liability (Schedule Of Change In Medical Claims Liability) (Details)

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Medical Claims Liability (Schedule Of Change In Medical Claims Liability) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Medical Claims Liability [Abstract]      
Balance, January 1, $ 456,765 $ 470,932 $ 384,360
Incurred related to: Current year 4,390,123 3,652,521 3,283,141
Incurred related to: Prior years (65,377) (68,069) (53,010)
Total incurred 4,324,746 3,584,452 3,230,131
Paid related to: Current year 3,788,808 3,203,585 2,819,591
Paid related to: Prior years 384,718 395,034 323,968
Total paid 4,173,526 3,598,619 3,143,559
Balance, December 31, 607,985 456,765 470,932
Reinsurance recoverables $ 5,313 $ 6,180