Debt Instrument, Stated Interest Spread

No definition available.

Name:	gdot_DebtInstrumentStatedInterestSpread
Namespace Prefix:	gdot_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
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+ Details

Name:	us-gaap_InterestExpenseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=gdot_BaseRateConditionOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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- Details

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Balance Type:
Period Type:

- Details

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Period Type:

- Details

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Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Data Type:	na
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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Debt - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended
Debt - Narrative (Details) - USD ($)	Oct. 31, 2019	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Line of Credit Facility [Line Items]
Line of credit		$ 0		$ 35,000,000
Line of Credit \| Federal Funds Rate \| Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders
Line of Credit Facility [Line Items]
Margin included in variable base rate	0.50%
Line of Credit \| Base Rate \| Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders
Line of Credit Facility [Line Items]
Margin included in variable base rate	1.00%
Line of Credit \| SOFR \| Minimum \| Wells Fargo Bank
Line of Credit Facility [Line Items]
Basis spread on variable base rate	1.25%
Line of Credit \| SOFR \| Maximum \| Wells Fargo Bank
Line of Credit Facility [Line Items]
Basis spread on variable base rate	2.00%
Line of Credit \| Base Rate \| Minimum \| Wells Fargo Bank
Line of Credit Facility [Line Items]
Basis spread on variable base rate	0.25%
Line of Credit \| Base Rate \| Maximum \| Wells Fargo Bank
Line of Credit Facility [Line Items]
Basis spread on variable base rate	1.00%
Revolving Credit Facility \| Minimum
Line of Credit Facility [Line Items]
Commitment fee	0.20%
Revolving Credit Facility \| Maximum
Line of Credit Facility [Line Items]
Commitment fee	0.35%
Revolving Credit Facility \| Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000
Facility term	5 years
Line of credit		0
Interest expense		$ 1,600,000	$ 0