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Stockholders' Equity and Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2018

Regulatory Capital Requirements [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following tables summarizes the Bank’s capital ratios and the ratios required by their federal regulator at December 31, 2018:

		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, 2018
First Business Bank
Total capital (to risk-weighted assets)		$	220,474			11.49	%		$	153,456			8.00	%		$	189,422			9.875	%		$	191,820			10.00	%
Tier 1 capital (to risk-weighted assets)		197,093				10.27			115,092				6.00			151,058				7.88			153,456				8.00
Common equity tier 1 capital (to risk-weighted assets)		197,093				10.27			86,319				4.50			122,285				6.375			124,683				6.50
Tier 1 leverage capital (to adjusted assets)		197,093				10.20			77,301				4.00			77,301				4.00			96,626				5.00

The following table summarizes both the Corporation’s and Bank’s capital ratios and the ratios required by their federal regulators at December 31, 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 December 31, 2017
Total capital (to risk-weighted assets)
Consolidated		$	214,501			11.98	%		$	143,219			8.00	%		$	165,597			9.250	%		N/A				N/A
First Business Bank		207,986				11.66			142,736				8.00			165,038				9.250			$	178,420			10.00	%
Tier 1 capital (to risk-weighted assets)
Consolidated		$	169,176			9.45	%		$	107,414			6.00	%		$	129,792			7.250	%		N/A				N/A
First Business Bank		186,374				10.45			107,052				6.00			129,354				7.250			$	142,736			8.00	%
Common equity tier 1 capital (to risk-weighted assets)
Consolidated		$	159,157			8.89	%		$	80,561			4.50	%		$	102,939			5.750	%		N/A				N/A
First Business Bank		186,374				10.45			80,289				4.50			102,591				5.750			$	115,973			6.50	%
Tier 1 leverage capital (to adjusted assets)
Consolidated		$	169,176			9.54	%		$	70,920			4.00	%		$	70,920			4.00	%		N/A				N/A
First Business Bank		186,374				10.56			70,617				4.00			70,617				4.00			$	88,272			5.00	%

Reconciliation of stockholders' equity to federal regulatory capital

The following table reconciles stockholders’ equity to federal regulatory capital at December 31, 2018 and 2017, respectively:

		As of December 31,
		2018				2017
		(In Thousands)
Stockholders’ equity of the Corporation		$	180,707			$	169,278
Net unrealized and accumulated losses on specific items		1,684				1,238
Disallowed servicing assets		(751		)		(848		)
Disallowed goodwill and other intangibles		(10,498		)		(10,511		)
Junior subordinated notes		10,033				10,019
Tier 1 capital		181,175				169,176
Allowable general valuation allowances and subordinated debt		47,150				45,325
Total capital		$	228,325			$	214,501

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[Table Text Block] for Reconciliation of stockholders' equity to federal regulatory capital [Table]

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958577-112826

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826

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