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Document and Entity Information
Nov. 12, 2019
Cover [Abstract]  
Entity Registrant Name RADIAN GROUP INC
Amendment Flag false
Entity Central Index Key 0000890926
Document Type 8-K
Document Period End Date Nov. 12, 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, State or Province PA
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