Stockholders' Equity and Regulatory Capital (Tables)

12 Months Ended

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