Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 2017

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following table summarizes both the Corporation’s and Bank’s capital ratios and the ratios required by their federal regulators at September 30, 2017:



	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)
As of September 30, 2017
Total capital (to risk-weighted assets)
Consolidated	$	209,495	11.91	%	$	140,737	8.00	%	$	162,727	9.25	%	N/A		N/A
First Business Bank	205,877		11.75		140,132		8.00		162,027		9.25		$	175,164	10.00	%
Tier 1 capital (to risk-weighted assets)
Consolidated	$	165,873	9.43	%	$	105,553	6.00	%	$	127,543	7.25	%	N/A		N/A
First Business Bank	185,954		10.62		105,099		6.00		126,994		7.25		$	140,132	8.00	%
Common equity tier 1 capital (to risk-weighted assets)
Consolidated	$	155,858	8.86	%	$	79,164	4.50	%	$	101,155	5.75	%	N/A		N/A
First Business Bank	185,954		10.62		78,824		4.50		100,720		5.75		$	113,857	6.50	%
Tier 1 leverage capital (to adjusted assets)
Consolidated	$	165,873	9.39	%	$	70,654	4.00	%	$	70,654	4.00	%	N/A		N/A
First Business Bank	185,954		10.56		70,409		4.00		70,409		4.00		$	88,011	5.00	%

The following table summarizes both the Corporation’s and the Corporation’s legacy bank charters’ ratios and the ratios required by their federal regulators at December 31, 2016:



	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)
As of December 31, 2016
Total capital (to risk-weighted assets)
Consolidated	$	204,117	11.74	%	$	139,101	8.00	%	$	149,968	8.625	%	N/A		N/A
First Business Bank	147,811		11.55		102,362		8.00		110,360		8.625		$	127,953	10.00	%
First Business Bank — Milwaukee	24,347		11.02		17,680		8.00		19,062		8.625		22,101		10.00
Alterra Bank	31,699		13.27		19,106		8.00		20,599		8.625		23,882		10.00
Tier 1 capital (to risk-weighted assets)
Consolidated	$	160,964	9.26	%	$	104,326	6.00	%	$	115,193	6.625	%	N/A		N/A
First Business Bank	134,208		10.49		76,772		6.00		84,769		6.625		$	102,362	8.00	%
First Business Bank — Milwaukee	22,323		10.10		13,260		6.00		14,642		6.625		17,680		8.00
Alterra Bank	28,685		12.01		14,329		6.00		15,822		6.625		19,106		8.00
Common equity tier 1 capital (to risk-weighted assets)
Consolidated	$	150,960	8.68	%	$	78,244	4.50	%	$	89,111	5.125	%	N/A		N/A
First Business Bank	134,208		10.49		57,579		4.50		65,576		5.125		$	83,170	6.50	%
First Business Bank — Milwaukee	22,323		10.10		9,945		4.50		11,327		5.125		14,365		6.50
Alterra Bank	28,685		12.01		10,747		4.50		12,240		5.125		15,524		6.50
Tier 1 leverage capital (to adjusted assets)
Consolidated	$	160,964	9.07	%	$	70,985	4.00	%	$	70,985	4.00	%	N/A		N/A
First Business Bank	134,208		10.40		51,600		4.00		51,600		4.00		$	64,500	5.00	%
First Business Bank — Milwaukee	22,323		9.15		9,758		4.00		9,758		4.00		12,198		5.00
Alterra Bank	28,685		10.58		10,842		4.00		10,842		4.00		13,552		5.00