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.

No definition available.

+ Details

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

- Definition

The net amount of operating interest income (expense).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.10)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Name:	us-gaap_InterestIncomeExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13)
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Name:	us-gaap_NoninterestIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 22: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_ProductOrServiceAxis=cash_RefundTransferFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_TaxAdvanceProductFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_PaymentCardandDepositFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_OtherBankandDepositFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_RentalIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_GainLossOnSaleOfSecuritiesAvailableForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_GainLossOnDivestituresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_GainLossonOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=cash_OtherRevenuesforFinancialAssetsandLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cash_ConsumerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cash_CommercialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_CorporateAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Revenue by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Net interest income	$ 68,475	$ 62,137	$ 208,324	$ 194,525
Noninterest income	62,453	41,048	221,361	199,044
Revenue	130,928	103,185	429,685	393,569
Refund transfer product fees
Disaggregation of Revenue [Line Items]
Noninterest income	12,073	4,595	35,400	33,726
Tax advance product fees
Disaggregation of Revenue [Line Items]
Noninterest income	891	28	47,413	31,840
Payment card and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	29,203	21,302	81,641	65,957
Other bank and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	338	214	709	1,083
Rental income
Disaggregation of Revenue [Line Items]
Noninterest income	9,976	11,231	29,707	34,682
Net gain realized on investment securities
Disaggregation of Revenue [Line Items]
Noninterest income			6	0
Gain on divestitures
Disaggregation of Revenue [Line Items]
Noninterest income			0	19,275
Gain (loss) on sale of other
Disaggregation of Revenue [Line Items]
Noninterest income	5,955	1,214	10,935	969
Other income
Disaggregation of Revenue [Line Items]
Noninterest income	4,017	2,464	15,550	11,512
Consumer
Disaggregation of Revenue [Line Items]
Net interest income	23,254	25,754	70,686	58,473
Noninterest income	43,229	26,254	166,605	134,227
Revenue	66,483	52,008	237,291	192,700
Consumer \| Refund transfer product fees
Disaggregation of Revenue [Line Items]
Noninterest income	12,073	4,595	35,400	33,726
Consumer \| Tax advance product fees
Disaggregation of Revenue [Line Items]
Noninterest income	891	28	47,413	31,840
Consumer \| Payment card and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	29,203	21,302	81,641	65,957
Consumer \| Other bank and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Consumer \| Rental income
Disaggregation of Revenue [Line Items]
Noninterest income	6	5	16	14
Consumer \| Net gain realized on investment securities
Disaggregation of Revenue [Line Items]
Noninterest income			0	0
Consumer \| Gain on divestitures
Disaggregation of Revenue [Line Items]
Noninterest income			0	0
Consumer \| Gain (loss) on sale of other
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	(19)
Consumer \| Other income
Disaggregation of Revenue [Line Items]
Noninterest income	1,056	324	2,135	2,709
Commercial
Disaggregation of Revenue [Line Items]
Net interest income	44,728	36,104	128,980	112,866
Noninterest income	17,988	13,920	47,094	44,422
Revenue	62,716	50,024	176,074	157,288
Commercial \| Refund transfer product fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Commercial \| Tax advance product fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Commercial \| Payment card and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Commercial \| Other bank and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	334	213	694	759
Commercial \| Rental income
Disaggregation of Revenue [Line Items]
Noninterest income	9,970	11,226	29,691	33,354
Commercial \| Net gain realized on investment securities
Disaggregation of Revenue [Line Items]
Noninterest income			0	0
Commercial \| Gain on divestitures
Disaggregation of Revenue [Line Items]
Noninterest income			0	0
Commercial \| Gain (loss) on sale of other
Disaggregation of Revenue [Line Items]
Noninterest income	5,982	1,214	10,198	6,131
Commercial \| Other income
Disaggregation of Revenue [Line Items]
Noninterest income	1,702	1,267	6,511	4,178
Corporate Services/Other
Disaggregation of Revenue [Line Items]
Net interest income	493	279	8,658	23,186
Noninterest income	1,236	874	7,662	20,395
Revenue	1,729	1,153	16,320	43,581
Corporate Services/Other \| Refund transfer product fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Corporate Services/Other \| Tax advance product fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Corporate Services/Other \| Payment card and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	0
Corporate Services/Other \| Other bank and deposit fees
Disaggregation of Revenue [Line Items]
Noninterest income	4	1	15	324
Corporate Services/Other \| Rental income
Disaggregation of Revenue [Line Items]
Noninterest income	0	0	0	1,314
Corporate Services/Other \| Net gain realized on investment securities
Disaggregation of Revenue [Line Items]
Noninterest income			6	0
Corporate Services/Other \| Gain on divestitures
Disaggregation of Revenue [Line Items]
Noninterest income			0	19,275
Corporate Services/Other \| Gain (loss) on sale of other
Disaggregation of Revenue [Line Items]
Noninterest income	(27)	0	737	(5,143)
Corporate Services/Other \| Other income
Disaggregation of Revenue [Line Items]
Noninterest income	$ 1,259	$ 873	$ 6,904	$ 4,625