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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Provision for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
(Negative) provision for credit losses on: |  |
Loans | $ (351) | $ (525)
Unfunded Commitments | 101 | (275)
Total (negative) provision for credit losses | $ (250) | $ (800)

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- Definition Financing Receivable, Excluding Accrued Interest, Allowance For Credit Loss, Expense (Reversal) + References No definition available. + Details
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Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Financing Receivable, Excluding Accrued Interest, Unfunded Commitments + References No definition available. + Details
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Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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Balance Type: | debit
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