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, 2012
Dec. 31, 2011
Dec. 31, 2010
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]      
Balance, January 1, $ 607,985 $ 456,765 $ 470,932
Incurred related to: Current year 7,499,437 4,390,123 3,652,521
Incurred related to: Prior years (53,400) (65,377) (68,069)
Total incurred 7,446,037 4,324,746 3,584,452
Paid related to: Current year 6,535,537 3,788,808 3,203,585
Paid related to: Prior years 550,708 384,718 395,034
Total paid 7,086,245 4,173,526 3,598,619
Premium deficiency reserve 41,475 0 0
Balance, December 31, 926,302 607,985 456,765
Reinsurance recoverables 9,668 5,313  
Excluding Impact of Medical Costs for Retroactive Assignment in the Kentucky Health Plan [Member]
     
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]      
Incurred related to: Prior years $ (61,733)