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Regulatory Capital | 6 Months Ended
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Jun. 30, 2024
Banking and Thrift, Other Disclosure [Abstract] |
Regulatory Capital | As of June 30, 2024 and December 31, 2023, the Company exceeded all capital adequacy requirements to which it is subject. Actual capital amounts and ratios for the Company and its subsidiary Bank, as of June 30, 2024 and December 31, 2023 are presented in the following tables:
| Actual |  | Minimum Required for Capital Adequacy Purposes |  | For Capital Adequacy Purposes Plus Capital Conservation Buffer(1) |  | Minimum to Be Well Capitalized Under Prompt Corrective Action Requirements(2)
June 30, 2024 | Amount | Ratio |  | Amount | Ratio |  | Amount | Ratio |  | Amount | Ratio
Total risk-based capital: |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 2,970.0 |  | 13.80 | % |  | $ | 1,721.8 |  | 8.00 | % |  | $ | 2,259.9 |  | 10.50 | % |  | $ | 2,152.3 |  | 10.00 | %
FIB | 2,689.2 |  | 12.52 |  |  | 1,718.2 |  | 8.00 |  |  | 2,255.1 |  | 10.50 |  |  | 2,147.7 |  | 10.00 |
Tier 1 risk-based capital: |  |  |  |  |  |  |  |  |  |  |
Consolidated | 2,482.1 |  | 11.53 |  |  | 1,291.4 |  | 6.00 |  |  | 1,829.4 |  | 8.50 |  |  | 1,721.8 |  | 8.00 |
FIB | 2,458.9 |  | 11.45 |  |  | 1,288.6 |  | 6.00 |  |  | 1,825.6 |  | 8.50 |  |  | 1,718.2 |  | 8.00 |
Common equity tier 1 risk-based capital: |  |  |  |  |  |  |  |  |  |  |
Consolidated | 2,482.1 |  | 11.53 |  |  | 968.5 |  | 4.50 |  |  | 1,506.6 |  | 7.00 |  |  | 1,399.0 |  | 6.50 |
FIB | 2,458.9 |  | 11.45 |  |  | 966.5 |  | 4.50 |  |  | 1,503.4 |  | 7.00 |  |  | 1,396.0 |  | 6.50 |
Leverage capital ratio: |  |  |  |  |  |  |  |  |  |  |
Consolidated | 2,482.1 |  | 8.44 |  |  | 1,176.4 |  | 4.00 |  |  | 1,176.4 |  | 4.00 |  |  | 1,470.6 |  | 5.00 |
FIB | 2,458.9 |  | 8.37 |  |  | 1,174.7 |  | 4.00 |  |  | 1,174.7 |  | 4.00 |  |  | 1,468.4 |  | 5.00 |
| Actual |  | Minimum Required for Capital Adequacy Purposes |  | For Capital Adequacy Purposes Plus Capital Conservation Buffer(1) |  | Minimum to Be Well Capitalized Under Prompt Corrective Action Requirements(2)
December 31, 2023 | Amount | Ratio |  | Amount | Ratio |  | Amount | Ratio |  | Amount | Ratio
Total risk-based capital: |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 2,941.1 |  | 13.28 | % |  | $ | 1,771.6 |  | 8.00 | % |  | $ | 2,325.2 |  | 10.50 | % |  | $ | 2,214.5 |  | 10.00 | %
FIB | 2,662.0 |  | 12.04 |  |  | 1,768.3 |  | 8.00 |  |  | 2,320.8 |  | 10.50 |  |  | 2,210.3 |  | 10.00 |
Tier 1 risk-based capital: |  |  |  |  |  |  |  |  |  |  |
Consolidated | 2,454.4 |  | 11.08 |  |  | 1,328.7 |  | 6.00 |  |  | 1,882.3 |  | 8.50 |  |  | 1,771.6 |  | 8.00 |
FIB | 2,433.0 |  | 11.01 |  |  | 1,326.2 |  | 6.00 |  |  | 1,878.8 |  | 8.50 |  |  | 1,768.3 |  | 8.00 |
Common equity tier 1 risk-based capital: |  |  |  |  |  |  |  |  |  |  |
Consolidated | 2,454.4 |  | 11.08 |  |  | 996.5 |  | 4.50 |  |  | 1,550.1 |  | 7.00 |  |  | 1,439.4 |  | 6.50 |
FIB | 2,433.0 |  | 11.01 |  |  | 994.6 |  | 4.50 |  |  | 1,547.2 |  | 7.00 |  |  | 1,436.7 |  | 6.50 |
Leverage capital ratio: |  |  |  |  |  |  |  |  |  |  |
Consolidated | 2,454.4 |  | 8.22 |  |  | 1,193.9 |  | 4.00 |  |  | 1,193.9 |  | 4.00 |  |  | 1,492.3 |  | 5.00 |
FIB | 2,433.0 |  | 8.16 |  |  | 1,192.2 |  | 4.00 |  |  | 1,192.2 |  | 4.00 |  |  | 1,490.2 |  | 5.00 |
(1) The capital conservation buffer is an additional 2.5% of the amount necessary to meet the minimum risk-based capital requirements for total, tier 1, and common equity tier 1 risk-based capital. (2) The ratios to meet the requirements to be deemed “well-capitalized” are only applicable to FIB. However, the Company manages its capital position as if the requirements apply to the consolidated company and has presented the ratios as if they also applied on a consolidated basis. In connection with the adoption of CECL on January 1, 2020, the Company recognized an after-tax cumulative effect on retained earnings with a reduction totaling $24.1 million. In March 2020, the Office of the Comptroller of Currency, the Board of Governors of the Federal Reserve System, and the FDIC issued an interim final rule that allows banking organizations to mitigate the effects of ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASC 326”) on their regulatory capital computations. This interim rule is in addition to the three-year transition period already in place under the capital transition rule previously issued in February 2019. Banking organizations can elect to mitigate the estimated cumulative effects on regulatory capital for an additional two years. This rule allows an institution to defer incorporating the impact of ASC 326 into its regulatory capital calculation, including ratios, over an extended period. Additionally, the interim rule extends the transition period whereby an institution can defer the impact from ASC 326 on the current period, determined based on the difference between the new ASC 326 allowance for credit losses and the allowance for loan losses under the incurred loss method from previous GAAP, for up to two years. The total impact related to ASC 326 would then be transitioned into regulatory capital and the associated ratios over a three-year transition period, beginning after the initial two-year deferral period, for a total transition period of five years. The Company elected to opt into the transition election and adopted transition relief over the permissible five-year period.

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