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Note 10 - Losses and LAE Mortgage Insurance Loss Reserves Rollforward (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Loss reserve [Roll Forward] |  |  |  |  |
Balance at January 1 |  | $ 760,269 |  |  |
Deduct paid claims and LAE related to [Abstract] |  |  |  |  |
Balance at September 30 |  | 556,488 |  |  | $ 760,269
Mortgage Insurance Segment |  |  |  |  |
Loss reserve [Roll Forward] |  |  |  |  |
Balance at January 1 |  | 760,269 |  | $ 976,399 | 976,399
Less reinsurance recoverables | [1] | 6,851 |  | 8,286 | 8,286
Balance at beginning of period, net of reinsurance recoverables |  | 753,418 |  | 968,113 | 968,113
Add losses and LAE incurred in respect of default notices reported and unreported in [Abstract] |  |  |  |  |
Current year | [2] | 145,798 |  | 152,320 |
Prior years |  | (45,331) |  | (3,906) |
Total incurred losses and LAE |  | 100,467 |  | 148,414 |
Deduct paid claims and LAE related to [Abstract] |  |  |  |  |
Paid Losses and LAE Current year | [2] | 3,639 |  | 2,725 |
Paid losses and LAE Prior years |  | 301,228 |  | 298,352 |
Total paid losses and LAE |  | 304,867 | [3] | 301,077 |
Balance at end of period, net of reinsurance recoverables |  | 549,018 |  | 815,450 | 753,418
Add reinsurance recoverables | [1] | 7,470 |  | 6,484 | 6,851
Balance at September 30 |  | $ 556,488 |  | $ 821,934 | $ 760,269
Default To Claim Rate Detail [Abstract] |  |  |  |  |
Default To Claim Rate Estimate, Gross, For New Defaults |  | 10.50% |  | 12.00% | 12.00%
Risk In Force |  | $ 51,200,000 |  |  |
Mortgage Insurance Segment | Pool Insurance Mortgage Insurance Product [Member] |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  | 1.60% |  |  |
Loss reserve [Roll Forward] |  |  |  |  |
Balance at January 1 |  | $ 33,493 |  |  |
Less reinsurance recoverables | [4] | 35 |  |  |
Add losses and LAE incurred in respect of default notices reported and unreported in [Abstract] |  |  |  |  |
Prior years |  | 14,200 |  |  |
Deduct paid claims and LAE related to [Abstract] |  |  |  |  |
Add reinsurance recoverables | [4] | 25 |  |  | $ 35
Balance at September 30 |  | 33,781 |  |  | 33,493
Mortgage Insurance Segment | Primary Mortgage Product [Member] |  |  |  |  |
Loss reserve [Roll Forward] |  |  |  |  |
Less reinsurance recoverables | [4] | 6,816 |  |  |
Deduct paid claims and LAE related to [Abstract] |  |  |  |  |
Add reinsurance recoverables | [4] | $ 7,445 |  |  | $ 6,816
Default To Claim Rate Detail [Abstract] |  |  |  |  |
Weighted Average Default To Claim Rate Assumption Net Of Denials Rescissions and Reinstatements |  | 40.00% |  |  | 42.00%
Weighted Average Default To Claim Rate Assumption Excluding Pending Claims Net Of Denials And Rescissions |  | 38.00% |  |  | 40.00%
Default To Claim Rate Estimate, Gross, For Pre-Foreclosure Stage Defaults |  | 62.00% |  |  |
Gross Default To Claim Rate Estimate |  | 81.00% |  |  |
Hurricanes Harvey and Irma [Member] | Mortgage Insurance Segment |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |
Concentration Risk, Percentage |  | 8.80% |  |  |
Default To Claim Rate Detail [Abstract] |  |  |  |  |
Risk In Force |  | $ 4,400,000 |  |  |
Participating Policies, Amount in Force |  | 16,800,000 |  |  |
2013 Freddie Mac Agreement [Member] |  |  |  |  |
Deduct paid claims and LAE related to [Abstract] |  |  |  |  |
Balance at September 30 |  | 2,800 |  |  |
Radian Guaranty Inc [Member] | 2013 Freddie Mac Agreement [Member] |  |  |  |  |
Deduct paid claims and LAE related to [Abstract] |  |  |  |  |
Paid losses and LAE Prior years |  | $ 54,800 |  |  |
[1] | Related to ceded losses recoverable, if any, on captive reinsurance transactions, the QSR Transactions and the Single Premium QSR Transaction. See Note 7 for additional information.
[2] | Related to underlying defaulted loans with a most recent default notice dated in the year indicated. For example, if a loan had defaulted in a prior year, but then subsequently cured and later re-defaulted in the current year, that default would be considered a current year default.
[3] | Includes the payment of $54.8 million made in connection with the scheduled final settlement of the Freddie Mac Agreement in the third quarter of 2017.
[4] | Represents ceded losses on captive reinsurance transactions, the QSR Transactions and the Single Premium QSR Transaction.

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