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Document and Entity Information Document
9 Months Ended
Sep. 30, 2014
Nov. 03, 2014
Document Information [Line Items]    
Entity Registrant Name Radian Group Inc.  
Entity Central Index Key 0000890926  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Sep. 30, 2014  
Document Fiscal Year Focus 2014  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   191,051,817
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes