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Stockholders' Equity and Regulatory Capital (Tables) | 12 Months Ended
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Dec. 31, 2022
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, 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 | %
|  | As of December 31, 2021
|  | 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 |  | $ | 281,745 |  |  | 10.82 | % |  | $ | 208,337 |  |  | 8.00 | % |  | $ | 273,443 |  |  | 10.50 | % |  | N/A |  | N/A
First Business Bank |  | 280,448 |  |  | 10.78 |  |  | 208,142 |  |  | 8.00 |  |  | 273,187 |  |  | 10.50 |  |  | $ | 260,178 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 232,795 |  |  | 8.94 | % |  | $ | 156,253 |  |  | 6.00 | % |  | $ | 221,358 |  |  | 8.50 | % |  | N/A |  | N/A
First Business Bank |  | 255,286 |  |  | 9.81 |  |  | 156,107 |  |  | 6.00 |  |  | 221,151 |  |  | 8.50 |  |  | $ | 208,142 |  |  | 8.00 | %
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 222,719 |  |  | 8.55 | % |  | $ | 117,190 |  |  | 4.50 | % |  | $ | 182,295 |  |  | 7.00 | % |  | N/A |  | N/A
First Business Bank |  | 255,286 |  |  | 9.81 |  |  | 117,080 |  |  | 4.50 |  |  | 182,124 |  |  | 7.00 |  |  | $ | 169,116 |  |  | 6.50 | %
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 232,795 |  |  | 8.94 | % |  | $ | 104,145 |  |  | 4.00 | % |  | $ | 104,145 |  |  | 4.00 | % |  | N/A |  | N/A
First Business Bank |  | 255,286 |  |  | 9.81 |  |  | 104,045 |  |  | 4.00 |  |  | 104,045 |  |  | 4.00 |  |  | $ | 130,056 |  |  | 5.00 | %
Reconciliation of stockholders' equity to federal regulatory capital | The following table reconciles stockholders’ equity to federal regulatory capital at December 31, 2022 and 2021, respectively:
|  | As of December 31,
|  | 2022 |  | 2021
|  | (In Thousands)
Stockholders’ equity of the Corporation |  | $ | 260,640 |  |  | $ | 232,422 |
Net unrealized and accumulated losses on specific items |  | 15,310 |  |  | 1,457 |
Disallowed servicing assets |  | (706) |  |  | (727) |
Disallowed goodwill and other intangibles |  | (10,401) |  |  | (10,433) |
Junior subordinated notes |  | — |  |  | 10,076 |
Tier 1 capital |  | 264,843 |  |  | 232,795 |
Allowable general valuation allowances and subordinated debt |  | 59,050 |  |  | 48,950 |
Total capital |  | $ | 323,893 |  |  | $ | 281,745 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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