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Stockholders' Equity and Regulatory Capital (Tables)

12 Months Ended

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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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

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