Cover |
Dec. 06, 2022 |
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| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 06, 2022 |
| Entity Registrant Name | ISABELLA BANK CORP |
| Entity Incorporation, State or Country Code | MI |
| Entity File Number | 000-18415 |
| Entity Tax Identification Number | 38-2830092 |
| Entity Address, Address Line One | 401 North Main Street |
| Entity Address, City or Town | Mt. Pleasant |
| Entity Address, State or Province | MI |
| Entity Address, Postal Zip Code | 48858-1649 |
| City Area Code | 989 |
| Local Phone Number | 772-9471 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000842517 |
| Amendment Flag | false |
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- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. No definition available.
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- Definition Address Line 1 such as Attn, Building Name, Street Name No definition available.
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- Definition Name of the City or Town No definition available.
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- Definition Code for the postal or zip code No definition available.
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- Definition Indicate if registrant meets the emerging growth company criteria. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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