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Note 14 - Statutory Information Risk To Capital Calculation (Details) (Radian Guaranty [Member], USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Radian Guaranty [Member]
    
Risk to Capital Line Items [Line Items]    
Risk to Capital Ratio, Entity's Intended Maximum 20  
Risk In Force $ 28,287.9 [1] $ 26,128.2 [1]
Statutory surplus 1,315.5 1,317.8
Statutory contingency reserve 196.0 23.0
Statutory position $ 1,511.5 $ 1,340.8
Risk-to-capital 18.7 19.5
[1] Excludes risk ceded through reinsurance contracts (to third parties and affiliates) and RIF on defaulted loans.