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v3.23.1

Note 15 - Borrowings - Borrowed Funds (Details) (Parentheticals) | Mar. 31, 2023 | Dec. 31, 2022
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Federal Home Loan Bank of Indianapolis [Member] |  |
Interest rate |  | 4.30%
Bank Term Funding Program (BTFP) [Member] |  |
Interest rate | 4.38% |

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- Definition Interest rate of advances made and reported by Federal Home Loan Bank (FHLBank). + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=fnwd_BankTermFundingProgramBTFPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |