v3.26.1

Cover Page - USD ($) $ in Millions	12 Months Ended
Cover Page - USD ($) $ in Millions	Dec. 31, 2025	Mar. 31, 2026	Jun. 30, 2025
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Current Fiscal Year End Date	--12-31
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 Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 589.0
Entity Common Stock, Shares Outstanding (in shares)		56,661,261
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE None.
Entity Registrant Name	GREEN DOT CORP
Entity Central Index Key	0001386278
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
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GREEN DOT CORP 10-K/A