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v3.3.1.900

Note 1 - Description of Business and Recent Developments Capital and Liquidity (Details) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) segment | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jun. 18, 2015 USD ($)
Business Overview [Abstract] |  |  |  |  |
Number of Reportable Segments | segment |  | 2 |  |  |
Debt and Equity Transactions [Abstract] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  | $ 202,000 |  |  | $ 202,000
Parent Company |  |  |  |  |
Insurance Regulatory Capital Requirements [Abstract] |  |  |  |  |
Related Party Transaction, Rate |  | 0.00% |  |  |
Debt and Equity Transactions [Abstract] |  |  |  |  |
Long-term Debt, Gross |  | $ 1,287,863 |  |  |
Radian Reinsurance [Member] |  |  |  |  |
Insurance Regulatory Capital Requirements [Abstract] |  |  |  |  |
Proceeds from Contributions from Parent |  | 50,000 |  |  |
Radian Guaranty [Member] |  |  |  |  |
Insurance Regulatory Capital Requirements [Abstract] |  |  |  |  |
Surplus Notes |  | 325,000 |  |  |
Proceeds from Contributions from Parent |  | $ 100,000 | $ 100,000 | $ 230,400 |
Mortgage Insurance Segment |  |  |  |  |
Mortgage Insurance [Abstract] |  |  |  |  |
Private Mortgage Insurance Protects Lenders For Loans Made With This Maximum Downpayment Percentage |  | 20.00% |  |  |
Percentage Of Primary Insurance On Domestic First-Lien Mortgages To Total Risk In Force |  | 97.40% |  |  |
Risk In Force |  | $ 45,800,000 |  |  |
Percentage Of Pool Insurance On Domestic First-Lien Mortgages To Total Risk In Force |  | 2.50% |  |  |
Nontraditional Risk In Force |  | $ 49,400 |  |  |
Mortgage Insurance Segment | Maximum [Member] |  |  |  |  |
Mortgage Insurance [Abstract] |  |  |  |  |
Percentage Of Non-Traditional RIF To Total RIF |  | 1.00% |  |  |
Reinsurer Concentration Risk [Member] | Second Quota Share Reinsurance Transaction [Member] | Radian Guaranty [Member] |  |  |  |  |
Insurance Regulatory Capital Requirements [Abstract] |  |  |  |  |
Profit Commission Earned on Ceded Risk |  | $ 8,000 |  |  |
Unearned Ceding Commissions |  | $ 8,500 |  |  |
Prepaid Reinsurance Commissions, Amortization Period |  | 5 years |  |  |
Senior Notes Due 2020 [Member] |  |  |  |  |
Debt and Equity Transactions [Abstract] |  |  |  |  |
Long-term Debt, Gross |  | $ 350,000 |  |  |
Convertible Senior Notes Due 2017 [Member] |  |  |  |  |
Debt and Equity Transactions [Abstract] |  |  |  |  |
Extinguishment of Debt, Amount | $ 389,100 | 389,100 |  |  |
Gain (Loss) on Repurchase of Debt Instrument | $ (91,900) | $ (91,900) |  |  |

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