Loans, Allowance for Loan Losses and Impaired Loans (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Aging analysis of the Bank's real estate and consumer loans
1 Month Past Due	$ 4,645	$ 3,660
2 Months Past Due	1,334	1,129
Greater Than 3 Months	3,246	3,689
Total Past Due	9,225	8,478
Current	411,894	419,311
Total Loan	421,119	427,789
Recorded Investment greater than 90 days and Accruing	0	0
Real estate loan [Member]
Aging analysis of the Bank's real estate and consumer loans
1 Month Past Due	2,939	1,814
2 Months Past Due	758	676
Greater Than 3 Months	2,894	3,348
Total Past Due	6,591	5,838
Current	258,517	265,900
Total Loan	265,108	271,738
Recorded Investment greater than 90 days and Accruing	0	0
Consumer and other loans [Member]
Aging analysis of the Bank's real estate and consumer loans
1 Month Past Due	1,706	1,846
2 Months Past Due	576	453
Greater Than 3 Months	352	341
Total Past Due	2,634	2,640
Current	153,377	153,411
Total Loan	156,011	156,051
Recorded Investment greater than 90 days and Accruing	$ 0	$ 0

Financing receivable recorded investment 90 days past due and nonaccrual.

No definition available.

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Namespace Prefix:	czwi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing receivables that are less than 30 days past due.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953401-111524

+ Details

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Period Type:	instant

- Definition

Financing receivables that are less than 60 days past due but more than 29 days past due.

+ References

+ Details

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

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5111-111524

+ Details

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- Details

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Balance Type:	na
Period Type:	duration

- Definition

Financing receivables that are current.

+ References

+ Details

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

- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

+ Details

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

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522

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

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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