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Capital Ratios and Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2024
Equity [Abstract] |
Summary of compliance with regulatory capital requirements | The following tables set forth these requirements and our ratios as of:
| September 30, 2024
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Common equity Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | $ | 173,019 |  |  | 11.52 | % |  | $ | 105,136 |  |  | 7.00 | % |  | $ | 97,627 |  |  | 6.50 | %
Consolidated | 181,981 |  |  | 12.08 | % |  | 105,507 |  |  | 7.00 | % |  | N/A |  | N/A
Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 173,019 |  |  | 11.52 | % |  | 127,665 |  |  | 8.50 | % |  | 120,156 |  |  | 8.00 | %
Consolidated | 181,981 |  |  | 12.08 | % |  | 128,116 |  |  | 8.50 | % |  | N/A |  | N/A
Total capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 186,151 |  |  | 12.39 | % |  | 157,704 |  |  | 10.50 | % |  | 150,195 |  |  | 10.00 | %
Consolidated | 224,516 |  |  | 14.90 | % |  | 158,261 |  |  | 10.50 | % |  | N/A |  | N/A
Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 173,019 |  |  | 8.35 | % |  | 82,851 |  |  | 4.00 | % |  | 103,564 |  |  | 5.00 | %
Consolidated | 181,981 |  |  | 8.77 | % |  | 83,044 |  |  | 4.00 | % |  | N/A |  | N/A
| December 31, 2023
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Common equity Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | $ | 178,316 |  |  | 12.48 | % |  | $ | 100,043 |  |  | 7.00 | % |  | $ | 92,897 |  |  | 6.50 | %
Consolidated | 180,014 |  |  | 12.54 | % |  | 100,449 |  |  | 7.00 | % |  | N/A |  | N/A
Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 178,316 |  |  | 12.48 | % |  | 121,481 |  |  | 8.50 | % |  | 114,335 |  |  | 8.00 | %
Consolidated | 180,014 |  |  | 12.54 | % |  | 121,973 |  |  | 8.50 | % |  | N/A |  | N/A
Total capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 191,739 |  |  | 13.42 | % |  | 150,065 |  |  | 10.50 | % |  | 142,919 |  |  | 10.00 | %
Consolidated | 222,772 |  |  | 15.52 | % |  | 150,673 |  |  | 10.50 | % |  | N/A |  | N/A
Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
Isabella Bank | 178,316 |  |  | 8.71 | % |  | 81,935 |  |  | 4.00 | % |  | 102,419 |  |  | 5.00 | %
Consolidated | 180,014 |  |  | 8.76 | % |  | 82,154 |  |  | 4.00 | % |  | N/A |  | N/A
Summary of the components of accumulated other comprehensive income | The following table summarizes the changes in AOCI by component for the:
| Three Months Ended September 30
| 2024 |  | 2023
| Unrealized Gains (Losses) on AFS Securities |  |  |  | Defined Benefit Pension Plan |  | Total |  | Unrealized Gains (Losses) on AFS Securities |  |  |  | Defined Benefit Pension Plan |  | Total
Balance, July 1 | $ | (26,939) |  |  |  |  | $ | (697) |  |  | $ | (27,636) |  |  | $ | (35,051) |  |  |  |  | $ | (1,366) |  |  | $ | (36,417) |
OCI before reclassifications | 13,081 |  |  |  |  | — |  |  | 13,081 |  |  | (6,708) |  |  |  |  | — |  |  | (6,708) |
Amounts reclassified from AOCI | — |  |  |  |  | — |  |  | — |  |  | — |  |  |  |  | — |  |  | — |
Subtotal | 13,081 |  |  |  |  | — |  |  | 13,081 |  |  | (6,708) |  |  |  |  | — |  |  | (6,708) |
Tax effect | (2,724) |  |  |  |  | — |  |  | (2,724) |  |  | 1,394 |  |  |  |  | — |  |  | 1,394 |
OCI, net of tax | 10,357 |  |  |  |  | — |  |  | 10,357 |  |  | (5,314) |  |  |  |  | — |  |  | (5,314) |
Balance, September 30 | $ | (16,582) |  |  |  |  | $ | (697) |  |  | $ | (17,279) |  |  | $ | (40,365) |  |  |  |  | $ | (1,366) |  |  | $ | (41,731) |
| Nine Months Ended September 30
| 2024 |  | 2023
| Unrealized Gains (Losses) on AFS Securities |  | Defined Benefit Pension Plan |  | Total |  | Unrealized Gains (Losses) on AFS Securities |  | Defined Benefit Pension Plan |  | Total
Balance, January 1 | $ | (25,199) |  |  | $ | (697) |  |  | $ | (25,896) |  |  | $ | (35,828) |  |  | $ | (1,366) |  |  | $ | (37,194) |
OCI before reclassifications | 10,858 |  |  | — |  |  | 10,858 |  |  | (5,736) |  |  | — |  |  | (5,736) |
Amounts reclassified from AOCI | — |  |  | — |  |  | — |  |  | (67) |  |  | — |  |  | (67) |
Subtotal | 10,858 |  |  | — |  |  | 10,858 |  |  | (5,803) |  |  | — |  |  | (5,803) |
Tax effect | (2,241) |  |  | — |  |  | (2,241) |  |  | 1,266 |  |  | — |  |  | 1,266 |
OCI, net of tax | 8,617 |  |  | — |  |  | 8,617 |  |  | (4,537) |  |  | — |  |  | (4,537) |
Balance, September 30 | $ | (16,582) |  |  | $ | (697) |  |  | $ | (17,279) |  |  | $ | (40,365) |  |  | $ | (1,366) |  |  | $ | (41,731) |
A summary of the components of unrealized gains on AFS securities included in OCI follows for the:
| Three Months Ended September 30
| 2024 |  | 2023
| Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total |  | Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total
Unrealized gains (losses) arising during the period | $ | 109 |  |  | $ | 12,972 |  |  | $ | 13,081 |  |  | $ | (67) |  |  | $ | (6,641) |  |  | $ | (6,708) |
Tax effect | — |  |  | (2,724) |  |  | (2,724) |  |  | — |  |  | 1,394 |  |  | 1,394 |
Unrealized gains (losses), net of tax | $ | 109 |  |  | $ | 10,248 |  |  | $ | 10,357 |  |  | $ | (67) |  |  | $ | (5,247) |  |  | $ | (5,314) |
| Nine Months Ended September 30
| 2024 |  | 2023
| Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total |  | Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total
Unrealized gains (losses) arising during the period | $ | 186 |  |  | $ | 10,672 |  |  | $ | 10,858 |  |  | $ | 228 |  |  | $ | (5,964) |  |  | $ | (5,736) |
Reclassification adjustment for net (gains) losses included in net income | — |  |  | — |  |  | — |  |  | — |  |  | (67) |  |  | (67) |
Net unrealized gains (losses) | 186 |  |  | 10,672 |  |  | 10,858 |  |  | 228 |  |  | (6,031) |  |  | (5,803) |
Tax effect | — |  |  | (2,241) |  |  | (2,241) |  |  | — |  |  | 1,266 |  |  | 1,266 |
Unrealized gains (losses), net of tax | $ | 186 |  |  | $ | 8,431 |  |  | $ | 8,617 |  |  | $ | 228 |  |  | $ | (4,765) |  |  | $ | (4,537) |

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