Stockholders' Equity and Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2016

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following table summarizes both the Corporation’s and Banks’ capital ratios and the ratios required by their federal regulators at December 31, 2016 and 2015, respectively:



	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



	Actual				Minimum Required for Capital Adequacy Purposes				Minimum Required to Be Well Capitalized Under Prompt Corrective Action Requirements
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(Dollars in Thousands)
As of December 31, 2015
Total capital (to risk-weighted assets)
Consolidated	$	189,163	11.11	%	$	136,208	8.00	%	N/A		N/A
First Business Bank	141,388		11.12		101,754		8.00		$	127,193	10.00	%
First Business Bank – Milwaukee	20,931		12.03		13,914		8.00		17,392		10.00
Alterra Bank	30,300		11.39		21,279		8.00		26,598		10.00
Tier 1 capital (to risk-weighted assets)
Consolidated	$	149,920	8.81	%	$	102,156	6.00	%	N/A		N/A
First Business Bank	128,852		10.13		76,316		6.00		$	101,754	8.00	%
First Business Bank – Milwaukee	19,172		11.02		10,435		6.00		13,914		8.00
Alterra Bank	28,278		10.63		15,959		6.00		21,279		8.00
Common equity tier 1 capital (to risk-weighted assets)
Consolidated	$	139,920	8.22	%	$	76,617	4.50	%	N/A		N/A
First Business Bank	128,852		10.13		57,237		4.50		$	110,669	6.50	%
First Business Bank – Milwaukee	19,172		11.02		7,826		4.50		82,675		6.50
Alterra Bank	28,278		10.63		11,969		4.50		11,305		6.50
Tier 1 leverage capital (to adjusted assets)
Consolidated	$	149,920	8.63	%	$	69,466	4.00	%	N/A		N/A
First Business Bank	128,852		10.44		49,359		4.00		$	61,698	5.00	%
First Business Bank – Milwaukee	19,172		7.81		9,821		4.00		12,276		5.00
Alterra Bank	28,278		9.89		11,441		4.00		14,301		5.00

Reconciliation of stockholders' equity to federal regulatory capital

The following table reconciles stockholders’ equity to federal regulatory capital at December 31, 2016 and 2015, respectively:



	As of December 31,
	2016			2015
	(In Thousands)
Stockholders’ equity of the Corporation	$	161,650		$	150,832
Net unrealized and accumulated losses on specific items	522			80
Disallowed servicing assets	(652		)	(370		)
Disallowed goodwill and other intangibles	(10,560		)	(10,622		)
Junior subordinated notes	10,004			10,000
Tier 1 capital	160,964			149,920
Allowable general valuation allowances and subordinated debt	43,153			39,243
Total capital	$	204,117		$	189,163