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Regulatory Capital (Tables) | 6 Months Ended
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Jun. 30, 2024
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | The following tables summarize both the Corporation’s and the Bank’s capital ratios and the ratios required by their federal regulators:
|  | As of June 30, 2024 |
|  | Actual (1) |  |  | Minimum Required for Capital Adequacy Purposes |  |  | For Capital Adequacy Purposes Plus Capital Conservation Buffer |  |  | Minimum Required to Be Well Capitalized Under Prompt Corrective Action Requirements |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
|  | (Dollars in Thousands) |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 392,359 |  |  |  | 11.45 | % |  | $ | 274,074 |  |  |  | 8.00 | % |  | $ | 359,722 |  |  |  | 10.50 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 392,709 |  |  |  | 11.46 |  |  |  | 274,045 |  |  |  | 8.00 |  |  |  | 359,684 |  |  |  | 10.50 |  |  | $ | 342,556 |  |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 307,878 |  |  |  | 8.99 | % |  | $ | 205,556 |  |  |  | 6.00 | % |  | $ | 291,204 |  |  |  | 8.50 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 357,723 |  |  |  | 10.44 |  |  |  | 205,534 |  |  |  | 6.00 |  |  |  | 291,173 |  |  |  | 8.50 |  |  | $ | 274,045 |  |  |  | 8.00 | %
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 295,886 |  |  |  | 8.64 | % |  | $ | 154,167 |  |  |  | 4.50 | % |  | $ | 239,815 |  |  |  | 7.00 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 357,723 |  |  |  | 10.44 |  |  |  | 154,150 |  |  |  | 4.50 |  |  |  | 239,789 |  |  |  | 7.00 |  |  | $ | 222,662 |  |  |  | 6.50 | %
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 307,878 |  |  |  | 8.51 | % |  | $ | 144,664 |  |  |  | 4.00 | % |  | $ | 144,664 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 357,723 |  |  |  | 9.89 |  |  |  | 144,682 |  |  |  | 4.00 |  |  |  | 144,682 |  |  |  | 4.00 |  |  | $ | 180,852 |  |  |  | 5.00 | %
|  | As of December 31, 2023 |
|  | Actual (1) |  |  | Minimum Required for Capital Adequacy Purposes |  |  | For Capital Adequacy Purposes Plus Capital Conservation Buffer |  |  | Minimum Required to Be Well Capitalized Under Prompt Corrective Action Requirements |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
|  | (Dollars in Thousands) |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 375,440 |  |  |  | 11.19 | % |  | $ | 268,500 |  |  |  | 8.00 | % |  | $ | 352,406 |  |  |  | 10.50 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 376,310 |  |  |  | 11.21 |  |  |  | 268,595 |  |  |  | 8.00 |  |  |  | 352,531 |  |  |  | 10.50 |  |  | $ | 335,744 |  |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 293,338 |  |  |  | 8.74 | % |  | $ | 201,375 |  |  |  | 6.00 | % |  | $ | 285,281 |  |  |  | 8.50 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 343,604 |  |  |  | 10.23 |  |  |  | 201,446 |  |  |  | 6.00 |  |  |  | 285,382 |  |  |  | 8.50 |  |  | $ | 268,595 |  |  |  | 8.00 | %
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 281,346 |  |  |  | 8.38 | % |  | $ | 151,031 |  |  |  | 4.50 | % |  | $ | 234,937 |  |  |  | 7.00 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 343,604 |  |  |  | 10.23 |  |  |  | 151,085 |  |  |  | 4.50 |  |  |  | 235,021 |  |  |  | 7.00 |  |  | $ | 218,233 |  |  |  | 6.50 | %
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 293,338 |  |  |  | 8.43 | % |  | $ | 139,145 |  |  |  | 4.00 | % |  | $ | 139,145 |  |  |  | 4.00 | % |  | N/A |  |  | N/A |
First Business Bank |  |  | 343,604 |  |  |  | 9.87 |  |  |  | 139,262 |  |  |  | 4.00 |  |  |  | 139,262 |  |  |  | 4.00 |  |  | $ | 174,077 |  |  |  | 5.00 | %
(1) 2024 and 2023 capital amounts include $677,000 and $1.0 million, respectively, of additional stockholders’ equity as elected by the Corporation and permitted by federal banking regulatory agencies related to the adoption of ASC 326. Risk-weighted assets were also adjusted accordingly.

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
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