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Regulatory Capital (Tables)

6 Months Ended

Jun. 30, 2019

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The following tables summarize the Bank’s capital ratios and the ratios required by its federal regulator:

		As of June 30, 2019
		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)
First Business Bank
Total capital (to risk-weighted assets)		$	227,333			11.63	%		$	156,436			8.00	%		$	205,322			10.50	%		$	195,545			10.00	%
Tier 1 capital (to risk-weighted assets)		205,445				10.51			117,327				6.00			166,213				8.50			156,436				8.00
Common equity tier 1 capital (to risk-weighted assets)		205,445				10.51			87,995				4.50			136,882				7.00			127,104				6.50
Tier 1 leverage capital (to adjusted assets)		205,445				10.26			80,121				4.00			80,121				4.00			100,151				5.00

		As of 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)
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				7.875			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

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- References

No definition available.

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- Definition

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=117337116&loc=SL5958577-112826

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=117337116&loc=d3e65071-112826

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826

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