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Document and Entity Information
Aug. 28, 2019
Cover [Abstract]  
Entity Registrant Name RADIAN GROUP INC
Entity Address, State or Province PA
Amendment Flag false
Entity Central Index Key 0000890926
Document Type 8-K
Document Period End Date Aug. 28, 2019
Entity Incorporation State Country Code DE
Entity File Number 1-11356
Entity Tax Identification Number 23-2691170
Entity Address, Address Line One 1500 Market Street
Entity Address, City or Town Philadelphia
Entity Address, Postal Zip Code 19102
City Area Code (215)
Local Phone Number 231-1000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.001 par value per share
Trading Symbol RDN
Security Exchange Name NYSE
Entity Emerging Growth Company false