v3.26.1
Cover Page - shares
3 Months Ended
Mar. 31, 2026
Apr. 30, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-34819  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 95-4766827  
Entity Address, Address Line One 1675 N. Freedom Blvd (200 West) Building 1  
Entity Address, City or Town Provo,  
Entity Address, State or Province UT  
Entity Address, Postal Zip Code 84604  
City Area Code (626)  
Local Phone Number 765-2000  
Title of 12(b) Security Class A Common Stock, $0.001 par value  
Trading Symbol GDOT  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   56,680,265
Entity Registrant Name GREEN DOT CORP  
Entity Central Index Key 0001386278  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false