SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2014 Segment	Sep. 30, 2013
PRINCIPLES OF CONSOLIDATION [Abstract]
Percentage of interest in subsidiary (in hundredths)	100.00%
NATURE OF BUSINESS AND INDUSTRY SEGMENT INFORMATION [Abstract]
Number of reporting segments	2
CASH AND CASH EQUIVALENTS AND FEDERAL FUNDS SOLD [Abstract]
Terms of FHLB advances	90 days
Reserve balances in cash or on deposit with FRB (Federal Reserve Bank)	$ 8.3	$ 4.1
Interest bearing deposits held at FRB	9.1
LOANS RECEIVABLE [Abstract]
Period when loan becomes delinquent	90 days
MORTGAGE SERVICING AND TRANSFERS OF FINANCIAL ASSETS [Abstract]
Aggregate unpaid balance of loans serviced for others	$ 22.5	$ 17.3
Building [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises, furniture and equipment, estimated useful lives	10 years
Building [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises, furniture and equipment, estimated useful lives	40 years
Leasehold Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Premises, furniture and equipment, estimated useful lives	2 years
Leasehold Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Premises, furniture and equipment, estimated useful lives	15 years

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Name:	cash_NatureOfBusinessAndIndustrySegmentInformationAbstract
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- Definition

The past due period when a loan is considered to be delinquent or when the collection of interest and principal becomes doubtful.

+ References

No definition available.

+ Details

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- Details

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- Definition

This element represent the terms of FHLB advances.

+ References

No definition available.

+ Details

Name:	cash_TermsOfFhlbAdvances
Namespace Prefix:	cash_
Data Type:	xbrli:durationItemType
Balance Type:	na
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- Definition

Cash deposited in a special reserve account for the exclusive benefit of customers pursuant to SEC Regulations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 305

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6478312&loc=d3e61473-112792

+ Details

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Period Type:	instant

- Definition

For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6476743&loc=d3e59706-112781

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.2)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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- Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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- Definition

This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719

+ Details

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- Details

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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- Details

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