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LOANS, ALLOWANCE FOR CREDIT LOSSES AND IMPAIRED LOANS - Accelerate Accretion and Lower Future Years Accretion (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($)
Receivables [Abstract] |
2023 | $ 363
2024 | 215
2025 | 180
2026 | 84
2027 | 77
Thereafter | 751
Total | $ 1,670

X
- Definition Expected Accretion Expense, After Year Five + References No definition available. + Details
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Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Accretion Expense, Total + References No definition available. + Details
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Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Accretion Expense, Year Five + References No definition available. + Details
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Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Accretion Expense, Year Four + References No definition available. + Details
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Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Accretion Expense, Year One + 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 Expected Accretion Expense, Year Three + 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 Expected Accretion Expense, Year Two + References No definition available. + Details
Name: | czwi_ExpectedAccretionExpenseYearTwo
Namespace Prefix: | czwi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration