Note 16 - Subsequent Events (Notes)	9 Months Ended
Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Subsequent Events Revolving Credit Facility On October 16, 2017, Radian Group entered into a three-year, $225 million unsecured revolving credit facility with a syndicate of bank lenders. Borrowings under the credit facility may be used for working capital and general corporate purposes, including, without limitation, capital contributions to Radian Group’s insurance and reinsurance subsidiaries as well as growth initiatives. Terms of the credit facility include an option to increase the amount during the term of the agreement, up to a total of $300 million. 2018 Single Premium QSR Transaction In October 2017, we entered into the 2018 Single Premium QSR Transaction with a panel of eight third-party reinsurers. Under the 2018 Single Premium QSR Transaction, beginning with the business written in January 2018, we expect to cede 65% of our Single Premium NIW, subject to certain conditions and a limitation on ceded premiums written equal to $335 million for policies issued between January 1, 2018 and December 31, 2019. The parties may mutually agree to increase the amount of ceded risk above this level. Radian Guaranty will receive a 25% ceding commission for premiums ceded pursuant to this transaction. Radian Guaranty will also receive an annual profit commission based on the performance of the loans subject to the agreement, provided that the loss ratio on the subject loans is below 56% for that calendar year. Radian Guaranty may discontinue ceding new policies under the agreement at the end of any calendar quarter. Radian Guaranty also may terminate this agreement if one or both of the GSEs no longer grant full credit for the reinsurance. The agreement is scheduled to terminate on December 31, 2029. However, Radian Guaranty has the option, based on certain conditions and subject to a termination fee, to terminate the agreement as of January 1, 2022, or at the end of any calendar quarter thereafter. Termination of the agreement would result in Radian Guaranty reassuming the related RIF in exchange for a net payment from the reinsurer calculated in accordance with the terms of the agreement. The 2018 Single Premium QSR Transaction, including the terms of the agreement and the amount of credit we receive under the PMIERs financial requirements, is subject to GSE approval. We can provide no assurance if and when the GSEs may approve the 2018 Single Premium QSR Transaction, and if it is approved, whether it will be approved in its current form or on alternative terms and conditions that are acceptable to us and the third-party reinsurers.

Subsequent Events

Revolving Credit Facility

On October 16, 2017, Radian Group entered into a three-year, $225 million unsecured revolving credit facility with a syndicate of bank lenders. Borrowings under the credit facility may be used for working capital and general corporate purposes, including, without limitation, capital contributions to Radian Group’s insurance and reinsurance subsidiaries as well as growth initiatives. Terms of the credit facility include an option to increase the amount during the term of the agreement, up to a total of $300 million.

2018 Single Premium QSR Transaction

In October 2017, we entered into the 2018 Single Premium QSR Transaction with a panel of eight third-party reinsurers. Under the 2018 Single Premium QSR Transaction, beginning with the business written in January 2018, we expect to cede 65% of our Single Premium NIW, subject to certain conditions and a limitation on ceded premiums written equal to $335 million for policies issued between January 1, 2018 and December 31, 2019. The parties may mutually agree to increase the amount of ceded risk above this level.

Radian Guaranty will receive a 25% ceding commission for premiums ceded pursuant to this transaction. Radian Guaranty will also receive an annual profit commission based on the performance of the loans subject to the agreement, provided that the loss ratio on the subject loans is below 56% for that calendar year. Radian Guaranty may discontinue ceding new policies under the agreement at the end of any calendar quarter. Radian Guaranty also may terminate this agreement if one or both of the GSEs no longer grant full credit for the reinsurance. The agreement is scheduled to terminate on December 31, 2029. However, Radian Guaranty has the option, based on certain conditions and subject to a termination fee, to terminate the agreement as of January 1, 2022, or at the end of any calendar quarter thereafter. Termination of the agreement would result in Radian Guaranty reassuming the related RIF in exchange for a net payment from the reinsurer calculated in accordance with the terms of the agreement.

The 2018 Single Premium QSR Transaction, including the terms of the agreement and the amount of credit we receive under the PMIERs financial requirements, is subject to GSE approval. We can provide no assurance if and when the GSEs may approve the 2018 Single Premium QSR Transaction, and if it is approved, whether it will be approved in its current form or on alternative terms and conditions that are acceptable to us and the third-party reinsurers.