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Stockholders' Equity and Regulatory Capital (Tables) | 12 Months Ended
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Dec. 31, 2023
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 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) 2023 capital amounts include $1.0 million of additional stockholders’ equity as elected by the Corporation and permitted by federal banking regulatory agencies. Risk-weighted assets were also adjusted accordingly.
|  | As of December 31, 2022
|  | Actual |  | 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 |  | $ | 323,893 |  |  | 11.26 | % |  | $ | 230,180 |  |  | 8.00 | % |  | $ | 302,111 |  |  | 10.50 | % |  | N/A |  | N/A
First Business Bank |  | 323,021 |  |  | 11.22 |  |  | 230,367 |  |  | 8.00 |  |  | 302,357 |  |  | 10.50 |  |  | $ | 287,959 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 264,843 |  |  | 9.20 | % |  | $ | 172,635 |  |  | 6.00 | % |  | $ | 244,566 |  |  | 8.50 | % |  | N/A |  | N/A
First Business Bank |  | 298,312 |  |  | 10.36 |  |  | 172,775 |  |  | 6.00 |  |  | 244,765 |  |  | 8.50 |  |  | $ | 230,367 |  |  | 8.00 | %
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 252,851 |  |  | 8.79 | % |  | $ | 129,476 |  |  | 4.50 | % |  | $ | 201,407 |  |  | 7.00 | % |  | N/A |  | N/A
First Business Bank |  | 298,312 |  |  | 10.36 |  |  | 129,581 |  |  | 4.50 |  |  | 201,571 |  |  | 7.00 |  |  | $ | 187,173 |  |  | 6.50 | %
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 264,843 |  |  | 9.17 | % |  | $ | 115,464 |  |  | 4.00 | % |  | $ | 115,464 |  |  | 4.00 | % |  | N/A |  | N/A
First Business Bank |  | 298,312 |  |  | 10.34 |  |  | 115,402 |  |  | 4.00 |  |  | 115,402 |  |  | 4.00 |  |  | $ | 144,252 |  |  | 5.00 | %
Reconciliation of stockholders' equity to federal regulatory capital | The following table reconciles stockholders’ equity to federal regulatory capital at December 31, 2023 and 2022, respectively:
|  | As of December 31,
|  | 2023 |  | 2022
|  | (In Thousands)
Stockholders’ equity of the Corporation |  | $ | 289,588 |  |  | $ | 260,640 |
Net unrealized and accumulated losses on specific items |  | 13,717 |  |  | 15,310 |
Disallowed servicing assets |  | (614) |  |  | (706) |
Disallowed goodwill and other intangibles |  | (10,368) |  |  | (10,401) |
ASC 326 Phase-in |  | 1,015 |  |  | — |
Tier 1 capital |  | 293,338 |  |  | 264,843 |
Allowable general valuation allowances and subordinated debt |  | 82,102 |  |  | 59,050 |
Total capital |  | $ | 375,440 |  |  | $ | 323,893 |

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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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