XML 15 R70.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Note 15 - Commitments and Contingencies Guarantor Obligations (Details) (Guaranteed Structured Transactions [Member], USD $) In Millions, unless otherwise specified | Mar. 31, 2015 transaction
--- | ---
Guaranteed Structured Transactions [Member] |
Guarantor Obligations [Line Items] |
Number of Guaranteed Structured Transactions For Radian Guaranty | 2 rdn_NumberOfGuaranteedStructuredTransactionsForRadianGuaranty / us-gaap_GuaranteeObligationsByNatureAxis = rdn_GuaranteedStructuredTransactionsMember
Guarantor Obligations, Maximum Exposure, Undiscounted | $ 126.4 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_GuaranteeObligationsByNatureAxis = rdn_GuaranteedStructuredTransactionsMember

X
- Definition Number of Guaranteed Structured Transactions For Radian Guaranty + References No definition available. + Details
Name: | rdn_NumberOfGuaranteedStructuredTransactionsForRadianGuaranty
Namespace Prefix: | rdn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_GuaranteeObligationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant