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Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 12, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-11356    
Entity Registrant Name RADIAN GROUP INC    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 23-2691170    
Entity Address, Address Line One 550 East Swedesford Road    
Entity Address, Address Line Two Suite 350    
Entity Address, City or Town Wayne    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 19087    
City Area Code 215    
Local Phone Number 231-1000    
Title of 12(b) Security Common Stock, $.001 par value per share    
Trading Symbol RDN    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Error Correction Flag false    
Entity Shell Company false    
Entity Public Float     $ 4,645,654,849
Entity Common Stock, Shares Outstanding   145,063,145  
Documents Incorporated by Reference

Form 10-K Reference Document

Definitive Proxy Statement for the Registrant’s 2024 Annual Meeting of Stockholders

Part III (Items 10 through 14)
   
Entity Central Index Key 0000890926    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Firm ID 238    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location Philadelphia, Pennsylvania    
Auditor Opinion

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Radian Group Inc. and its subsidiaries (the "Company") as of December 31, 2024 and 2023, and the related consolidated statements of operations, of comprehensive income, of changes in common stockholders' equity and of cash flows for each of the three years in the period ended December 31, 2024, including the related notes and financial statement schedules listed in the index appearing under Item 15(a)3 (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2024 and 2023, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2024 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2024, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.