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Note 1 - Condensed Consolidated Financial Statements - Business Overview, Recent Developments and Significant Accounting Policies Current Year Developments (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | May 06, 2019 | Mar. 20, 2019
First Quarter 2019 Repurchase Program |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 150.0
Total of All Repurchase Programs |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 250.0
Stock Repurchased During Period, Shares |  |  | 1,546,674 |  |
Accelerated Share Repurchases, Final Price Paid Per Share |  |  | $ 20.54 |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  | $ 218.2 |  |
Mortgage Insurance Segment |  |  |  |  |
Risk In Force |  |  | $ 57,400.0 |  |
Subsequent Event | Total of All Repurchase Programs |  |  |  |  |
Stock Repurchased During Period, Shares |  | 4,131,329 |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share |  | $ 21.94 |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  | $ 127.7 |
Subsequent Event | Radian Guaranty |  |  |  |  |
Statutory Accounting Practices, Dividends Paid with Approval of Regulatory Agency | $ 375.0 |  |  |  |
Subsequent Event | Eagle Re 2019-1 (Primary) | Mortgage Insurance Segment | Radian Guaranty |  |  |  |  |
Reinsurance Retention Policy, Excess Retention, Amount Reinsured | 562.0 |  |  |  |
Risk In Force | 10,700.0 |  |  |  |
Proceeds from Issuance of Debt | $ 562.0 |  |  |  |

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