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Reinsurance - Narrative (Details) $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Jul. 01, 2022 USD ($) | Jun. 30, 2022 USD ($) reinsuranceArrangement | Dec. 31, 2021 USD ($)
Mortgage |  |  |
Ceded Credit Risk [Line Items] |  |  |
RIF ceded |  | $ 63,800.0 | $ 60,900.0
Radian Guaranty |  |  |
Ceded Credit Risk [Line Items] |  |  |
Funds held under reinsurance agreements, asset |  | $ 127.3 | $ 167.9
Radian Guaranty | Maximum | Mortgage |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance retention policy, term of coverage, period |  | 12 years 6 months |
Radian Guaranty | Minimum |  |  |
Ceded Credit Risk [Line Items] |  |  |
Reinsurance retention policy, term of coverage, period |  | 10 years |
Excess-of-Loss Program | Radian Guaranty |  |  |
Ceded Credit Risk [Line Items] |  |  |
Number of fully collateralized reinsurance arrangements with the eagle re issuers | reinsuranceArrangement |  | 6 |
2022 QSR | Maximum | Subsequent Event |  |  |
Ceded Credit Risk [Line Items] |  |  |
RIF ceded | $ 8,500.0 |  |
2022 QSR | Radian Guaranty | Subsequent Event |  |  |
Ceded Credit Risk [Line Items] |  |  |
Ceding commission % | 20.00% |  |
2022 QSR | Radian Guaranty | Maximum | Subsequent Event |  |  |
Ceded Credit Risk [Line Items] |  |  |
Profit commission % | 59.00% |  |

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- Definition Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.2,10) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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