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Regulatory Capital (Tables) | 3 Months Ended
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Mar. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | The following tables summarize both the Corporation’s and the Bank’s capital ratios and the ratios required by their federal regulators:
|  | As of March 31, 2020
|  | 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)
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 242,869 |  |  | 11.74 | % |  | $ | 165,436 |  |  | 8.00 | % |  | $ | 217,135 |  |  | 10.50 | % |  | N/A |  |  | N/A |
First Business Bank |  | 234,506 |  |  | 11.41 |  |  | 164,397 |  |  | 8.00 |  |  | 215,771 |  |  | 10.50 |  |  | 205,496 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 195,318 |  |  | 9.45 | % |  | $ | 124,077 |  |  | 6.00 | % |  | $ | 175,776 |  |  | 8.50 | % |  | N/A |  |  | N/A |
First Business Bank |  | 210,672 |  |  | 10.25 |  |  | 123,298 |  |  | 6.00 |  |  | 174,672 |  |  | 8.50 |  |  | 164,397 |  |  | 8.00 |
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 185,267 |  |  | 8.96 | % |  | $ | 93,058 |  |  | 4.50 | % |  | $ | 144,756 |  |  | 7.00 | % |  | N/A |  |  | N/A |
First Business Bank |  | 210,672 |  |  | 10.25 |  |  | 92,473 |  |  | 4.50 |  |  | 143,847 |  |  | 7.00 |  |  | 133,572 |  |  | 6.50 |
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 195,318 |  |  | 9.33 | % |  | $ | 83,754 |  |  | 4.00 | % |  | $ | 83,754 |  |  | 4.00 | % |  | N/A |  |  | N/A |
First Business Bank |  | 210,672 |  |  | 10.09 |  |  | 83,525 |  |  | 4.00 |  |  | 83,525 |  |  | 4.00 |  |  | 104,406 |  |  | 5.00 |
|  | As of December 31, 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)
Total capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 239,029 |  |  | 12.01 | % |  | $ | 159,185 |  |  | 8.00 | % |  | $ | 208,930 |  |  | 10.50 | % |  | N/A |  |  | N/A |
First Business Bank |  | 233,181 |  |  | 11.79 |  |  | 158,177 |  |  | 8.00 |  |  | 207,607 |  |  | 10.50 |  |  | 197,721 |  |  | 10.00 | %
Tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 194,456 |  |  | 9.77 | % |  | $ | 119,388 |  |  | 6.00 | % |  | $ | 169,134 |  |  | 8.50 | % |  | N/A |  |  | N/A |
First Business Bank |  | 212,315 |  |  | 10.74 |  |  | 118,633 |  |  | 6.00 |  |  | 168,063 |  |  | 8.50 |  |  | 158,177 |  |  | 8.00 |
Common equity tier 1 capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 184,409 |  |  | 9.27 | % |  | $ | 89,541 |  |  | 4.50 | % |  | $ | 139,286 |  |  | 7.00 | % |  | N/A |  |  | N/A |
First Business Bank |  | 212,315 |  |  | 10.74 |  |  | 88,974 |  |  | 4.50 |  |  | 138,405 |  |  | 7.00 |  |  | 128,519 |  |  | 6.50 |
Tier 1 leverage capital (to adjusted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 194,456 |  |  | 9.27 | % |  | $ | 83,950 |  |  | 4.00 | % |  | $ | 83,950 |  |  | 4.00 | % |  | N/A |  |  | N/A |
First Business Bank |  | 212,315 |  |  | 10.18 |  |  | 83,414 |  |  | 4.00 |  |  | 83,414 |  |  | 4.00 |  |  | 104,268 |  |  | 5.00 |

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