FAIR VALUE MEASUREMENTS, Assets Measured at Fair Value on Recurring and Non-recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Available-for-sale Securities [Abstract]
Total debt securities	$ 688,952	$ 576,583
Total available for sale securities	1,555,104	1,256,087
Held-to-maturity Securities [Abstract]
Total held to maturity securities	493,350	346,847
Level 1 [Member]
Available-for-sale Securities [Abstract]
Total available for sale securities	1,106	914
Held-to-maturity Securities [Abstract]
Total held to maturity securities	0	0
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 1 [Member] \| One to Four Family Residential Mortgage Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 1 [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 1 [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 1 [Member] \| Consumer Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 1 [Member] \| Commercial Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 2 [Member]
Available-for-sale Securities [Abstract]
Total available for sale securities	1,553,998	1,255,173
Held-to-maturity Securities [Abstract]
Total held to maturity securities	493,350	346,847
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 2 [Member] \| One to Four Family Residential Mortgage Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 2 [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 2 [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 2 [Member] \| Consumer Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 2 [Member] \| Commercial Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Level 3 [Member]
Available-for-sale Securities [Abstract]
Total available for sale securities	0	0
Held-to-maturity Securities [Abstract]
Total held to maturity securities	0	0
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	783,778	707,774
Level 3 [Member] \| Total Impaired Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	1,187	2,543
Level 3 [Member] \| One to Four Family Residential Mortgage Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	141,183	121,385
Level 3 [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	353,769	314,372
Level 3 [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	38,364	40,003
Level 3 [Member] \| Consumer Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	35,341	33,504
Level 3 [Member] \| Commercial Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	27,085	23,245
Recurring [Member]
Available-for-sale Securities [Abstract]
Trust preferred securities	11,948	13,944
Small business administration securities	83,697	56,056
Obligations of states and political subdivisions	0	0
Non-bank qualified obligations of states and political subdivisions	703,235	608,590
Asset-backed securities	66,166
Mortgage-backed securities	688,952	576,583
Total debt securities	1,553,998	1,255,173
Common equities and mutual funds	1,106	914
Total available for sale securities	1,555,104	1,256,087
Held-to-maturity Securities [Abstract]
Trust preferred securities	0	0
Small business administration securities	0	0
Obligations of states and political subdivisions	20,983	19,413
Non-bank qualified obligations of states and political subdivisions	403,959	261,330
Asset-backed securities	0
Mortgage-backed securities	68,408	66,104
Total debt securities	493,350	346,847
Common equities and mutual funds	0	0
Total held to maturity securities	493,350	346,847
Recurring [Member] \| Level 1 [Member]
Available-for-sale Securities [Abstract]
Trust preferred securities	0	0
Small business administration securities	0	0
Obligations of states and political subdivisions	0	0
Non-bank qualified obligations of states and political subdivisions	0	0
Asset-backed securities	0
Mortgage-backed securities	0	0
Total debt securities	0	0
Common equities and mutual funds	1,106	914
Total available for sale securities	1,106	914
Held-to-maturity Securities [Abstract]
Trust preferred securities	0	0
Small business administration securities	0	0
Obligations of states and political subdivisions	0	0
Non-bank qualified obligations of states and political subdivisions	0	0
Asset-backed securities	0
Mortgage-backed securities	0	0
Total debt securities	0	0
Common equities and mutual funds	0	0
Total held to maturity securities	0	0
Recurring [Member] \| Level 2 [Member]
Available-for-sale Securities [Abstract]
Trust preferred securities	11,948	13,944
Small business administration securities	83,697	56,056
Obligations of states and political subdivisions	0	0
Non-bank qualified obligations of states and political subdivisions	703,235	608,590
Asset-backed securities	66,166
Mortgage-backed securities	688,952	576,583
Total debt securities	1,553,998	1,255,173
Common equities and mutual funds	0	0
Total available for sale securities	1,553,998	1,255,173
Held-to-maturity Securities [Abstract]
Trust preferred securities	0	0
Small business administration securities	0	0
Obligations of states and political subdivisions	20,983	19,413
Non-bank qualified obligations of states and political subdivisions	403,959	261,330
Asset-backed securities	0
Mortgage-backed securities	68,408	66,104
Total debt securities	493,350	346,847
Common equities and mutual funds	0	0
Total held to maturity securities	493,350	346,847
Recurring [Member] \| Level 3 [Member]
Available-for-sale Securities [Abstract]
Trust preferred securities	0	0
Small business administration securities	0	0
Obligations of states and political subdivisions	0	0
Non-bank qualified obligations of states and political subdivisions	0	0
Asset-backed securities	0
Mortgage-backed securities	0	0
Total debt securities	0	0
Common equities and mutual funds	0	0
Total available for sale securities	0	0
Held-to-maturity Securities [Abstract]
Trust preferred securities	0	0
Small business administration securities	0	0
Obligations of states and political subdivisions	0	0
Non-bank qualified obligations of states and political subdivisions	0	0
Asset-backed securities	0
Mortgage-backed securities	0	0
Total debt securities	0	0
Common equities and mutual funds	0	0
Total held to maturity securities	0	0
Nonrecurring [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	1,187	2,543
Nonrecurring [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	612	663
Nonrecurring [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	575	1,880
Nonrecurring [Member] \| Level 1 [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Nonrecurring [Member] \| Level 1 [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Nonrecurring [Member] \| Level 1 [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Nonrecurring [Member] \| Level 2 [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Nonrecurring [Member] \| Level 2 [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Nonrecurring [Member] \| Level 2 [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	0	0
Nonrecurring [Member] \| Level 3 [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	1,187	2,543
Nonrecurring [Member] \| Level 3 [Member] \| Commercial and Multi-family Real Estate Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	612	663
Nonrecurring [Member] \| Level 3 [Member] \| Agricultural Operating Loans [Member]
Fair value of assets measured on non-recurring basis [Abstract]
Fair value	$ 575	$ 1,880

Fair value of asset backed securities investments classified as available for sale.

No definition available.

Name:	cash_AssetBackedSecuritiesAvailableForSaleFairValueDisclosure
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of asset backed securities investments classified as held To maturity.

+ References

No definition available.

+ Details

Name:	cash_AssetBackedSecuritiesHeldToMaturity
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents common equities and mutual funds as of the balance sheet date which have been categorized as available-for-sale.

+ References

No definition available.

+ Details

Name:	cash_CommonEquitiesAndMutualFundsAvailableForSale
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

No definition available.

+ Details

Name:	cash_CommonEquitiesAndMutualFundsHeldToMaturity
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	cash_FairValueAssetMeasuredOnNonrecurringBasisAbstract
Namespace Prefix:	cash_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of debt securities categorized as held-to-maturity.

+ References

No definition available.

+ Details

Name:	cash_HeldToMaturitySecuritiesDebtSecuritiesFairValue
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents non-bank qualified obligations of states and political subdivision as of the balance sheet date which have been categorized as available-for-sale.

+ References

No definition available.

+ Details

Name:	cash_NonBankQualifiedObligationsOfStatesAndPoliticalSubdivisionsAvailableForSale
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents non-bank qualified obligations of states and political subdivision as of the balance sheet date which have been categorized as held-to-maturity.

+ References

No definition available.

+ Details

Name:	cash_NonBankQualifiedObligationsOfStatesAndPoliticalSubdivisionsHeldToMaturity
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents obligations of states and political subdivision as of the balance sheet date which have been categorized as available-for-sale.

+ References

No definition available.

+ Details

Name:	cash_ObligationsOfStatesAndPoliticalSubdivisionsAvailableForSale
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents obligations of states and political subdivision as of the balance sheet date which have been categorized as held-to-maturity.

+ References

No definition available.

+ Details

Name:	cash_ObligationsOfStatesAndPoliticalSubdivisionsHeldToMaturity
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents debt securities issued by the Small Business Administration (SBA) as of the balance sheet date which have been categorized as available-for-sale.

+ References

No definition available.

+ Details

Name:	cash_SmallBusinessAdministrationSecuritiesAvailableForSale
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents debt securities issued by the Small Business Administration (SBA) as of the balance sheet date which have been categorized as held-to-maturity.

+ References

No definition available.

+ Details

Name:	cash_SmallBusinessAdministrationSecuritiesHeldToMaturity
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents trust preferred and corporate securities as of the balance sheet date which have been categorized as available-for-sale.

+ References

No definition available.

+ Details

Name:	cash_TrustPreferredAndCorporateSecuritiesAvailableForSale
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents trust preferred and corporate securities as of the balance sheet date which have been categorized as held-to-maturity.

+ References

No definition available.

+ Details

Name:	cash_TrustPreferredAndCorporateSecuritiesHeldToMaturity
Namespace Prefix:	cash_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Glossary Loan
-URI http://asc.fasb.org/extlink&oid=6517073

+ Details

Name:	us-gaap_LoansReceivableFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Mortgage-Backed Securities
-URI http://asc.fasb.org/extlink&oid=6517959

+ Details

Name:	us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Mortgage-Backed Securities
-URI http://asc.fasb.org/extlink&oid=6517959

+ Details

Name:	us-gaap_MortgageBackedSecuritiesHeldToMaturityFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=cash_OneToFourFamilyResidentialMortgageLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=cash_CommercialAndMultifamilyRealEstateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=cash_AgriculturalOperatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByAssetClassAxis=cash_ImpairedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: