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Regulatory Restrictions and Capital Adequacy (Tables) | 12 Months Ended
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Dec. 31, 2020
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract] |
Schedule of Capital Amount and Ratio Considered to be Capitalized | as set forth in the tables below:
| Actual |  |  |  | Minimum Capital Required |  | Required to be Considered Well Capitalized
| Capital Amount |  | Ratio |  |  |  |  |  | Capital Amount |  | Ratio |  | Capital Amount |  | Ratio
| (dollars in thousands)
As of December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital to Risk Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 1,010,608 |  |  | 14.88 | % |  |  |  |  |  | $ | 713,289 |  |  | 10.50 | % |  | $ | 679,323 |  |  | 10.00 | %
First Commonwealth Bank | 974,911 |  |  | 14.36 |  |  |  |  |  |  | 712,995 |  |  | 10.50 |  |  | 679,043 |  |  | 10.00 |
Tier I Capital to Risk Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 827,231 |  |  | 12.18 | % |  |  |  |  |  | $ | 577,424 |  |  | 8.50 | % |  | $ | 543,458 |  |  | 8.00 | %
First Commonwealth Bank | 791,568 |  |  | 11.66 |  |  |  |  |  |  | 577,186 |  |  | 8.50 |  |  | 543,234 |  |  | 8.00 |
Tier I Capital to Average Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 827,231 |  |  | 9.40 | % |  |  |  |  |  | $ | 352,023 |  |  | 4.00 | % |  | $ | 440,029 |  |  | 5.00 | %
First Commonwealth Bank | 791,568 |  |  | 9.01 |  |  |  |  |  |  | 351,244 |  |  | 4.00 |  |  | 439,055 |  |  | 5.00 |
Common Equity Tier I to Risk Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 757,231 |  |  | 11.15 | % |  |  |  |  |  | $ | 475,526 |  |  | 7.00 | % |  | $ | 441,560 |  |  | 6.50 | %
First Commonwealth Bank | 791,568 |  |  | 11.66 |  |  |  |  |  |  | 475,330 |  |  | 7.00 |  |  | 441,378 |  |  | 6.50 |
| Actual |  |  |  | Minimum Capital Required |  | Required to be Considered Well Capitalized
| Capital Amount |  | Ratio |  |  |  |  |  | Capital Amount |  | Ratio |  | Capital Amount |  | Ratio
| (dollars in thousands)
As of December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Capital to Risk Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 954,991 |  |  | 14.26 | % |  |  |  |  |  | $ | 703,370 |  |  | 10.50 | % |  | $ | 669,877 |  |  | 10.00 | %
First Commonwealth Bank | 913,863 |  |  | 13.67 |  |  |  |  |  |  | 702,006 |  |  | 10.50 |  |  | 668,577 |  |  | 10.00 |
Tier I Capital to Risk Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 800,526 |  |  | 11.95 | % |  |  |  |  |  | $ | 569,395 |  |  | 8.50 | % |  | $ | 535,901 |  |  | 8.00 | %
First Commonwealth Bank | 759,398 |  |  | 11.36 |  |  |  |  |  |  | 568,291 |  |  | 8.50 |  |  | 534,862 |  |  | 8.00 |
Tier I Capital to Average Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 800,526 |  |  | 10.17 | % |  |  |  |  |  | $ | 314,963 |  |  | 4.00 | % |  | $ | 393,704 |  |  | 5.00 | %
First Commonwealth Bank | 759,398 |  |  | 9.66 |  |  |  |  |  |  | 314,338 |  |  | 4.00 |  |  | 392,922 |  |  | 5.00 |
Common Equity Tier I to Risk Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
First Commonwealth Financial Corporation | $ | 730,526 |  |  | 10.91 | % |  |  |  |  |  | $ | 468,914 |  |  | 7.00 | % |  | $ | 435,420 |  |  | 6.50 | %
First Commonwealth Bank | 759,398 |  |  | 11.36 |  |  |  |  |  |  | 468,004 |  |  | 7.00 |  |  | 434,575 |  |  | 6.50 |

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