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Regulatory Capital (Tables) | 6 Months Ended
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Jun. 30, 2018
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:
|  | 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 June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 221,068 |  |  | 11.87 | % |  | $ | 149,042 |  |  | 8.00 | % |  | $ | 183,974 |  |  | 9.875 | % |  | N/A |  |  | N/A |
First Business Bank |  | 213,343 |  |  | 11.50 |  |  | 148,355 |  |  | 8.00 |  |  | 183,125 |  |  | 9.875 |  |  | $ | 185,444 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 174,038 |  |  | 9.34 | % |  | $ | 111,781 |  |  | 6.00 | % |  | $ | 146,713 |  |  | 7.875 | % |  | N/A |  |  | N/A |
First Business Bank |  | 190,160 |  |  | 10.25 |  |  | 111,266 |  |  | 6.00 |  |  | 146,037 |  |  | 7.875 |  |  | $ | 148,355 |  |  | 8.00 | %
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 164,012 |  |  | 8.80 | % |  | $ | 83,836 |  |  | 4.50 | % |  | $ | 118,768 |  |  | 6.375 | % |  | N/A |  |  | N/A |
First Business Bank |  | 190,160 |  |  | 10.25 |  |  | 83,450 |  |  | 4.50 |  |  | 118,220 |  |  | 6.375 |  |  | $ | 120,538 |  |  | 6.50 | %
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 174,038 |  |  | 9.25 | % |  | $ | 75,262 |  |  | 4.00 | % |  | $ | 75,262 |  |  | 4.00 | % |  | N/A |  |  | N/A |
First Business Bank |  | 190,160 |  |  | 10.15 |  |  | 74,938 |  |  | 4.00 |  |  | 74,938 |  |  | 4.00 |  |  | $ | 93,672 |  |  | 5.00 | %
|  | 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 | %

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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