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REGULATORY CAPITAL - Capital Amounts and Ratios (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Common Equity Tier 1 Capital to Risk Weighted Assets, Amount |  |
Actual | $ 1,081,686 | $ 995,874
Minimum Capital Requirement | 406,980 | 378,334
Minimum To Be Well Capitalized | $ 587,861 | $ 546,482
Common Equity Tier 1 Capital to Risk Weighted Assets, Ratio |  |
Actual | 11.96% | 11.85%
Minimum Capital Requirement | 4.50% | 4.50%
Minimum To Be Well Capitalized | 6.50% | 6.50%
Tier 1 Capital to Risk Weighted Assets, Amount |  |
Actual | $ 1,155,686 | $ 1,069,874
Minimum Capital Requirement | 542,640 | 504,445
Minimum To Be Well Capitalized | $ 723,521 | $ 672,594
Tier 1 Capital to Risk Weighted Assets, Ratio |  |
Actual | 12.78% | 12.73%
Minimum Capital Requirement | 6.00% | 6.00%
Minimum To Be Well Capitalized | 8.00% | 8.00%
Total Capital to Risk Weighted Assets, Amount |  |
Actual | $ 1,457,994 | $ 1,320,187
Minimum Capital Requirement | 723,521 | 672,594
Minimum To Be Well Capitalized | $ 904,401 | $ 840,742
Total Capital to Risk Weighted Assets, Ratio |  |
Actual | 16.12% | 15.70%
Minimum Capital Requirement | 8.00% | 8.00%
Minimum To Be Well Capitalized | 10.00% | 10.00%
Leverage Ratio of Tier 1 Capital to Average Assets, Amount |  |
Actual | $ 1,155,686 | $ 1,069,874
Minimum Capital Requirement | $ 489,124 | $ 502,336
Leverage Ratio of Tier 1 Capital to Average Assets, Ratio |  |
Actual | 9.45% | 8.52%
Minimum Capital Requirement | 4.00% | 4.00%
Busey Bank |  |
Common Equity Tier 1 Capital to Risk Weighted Assets, Amount |  |
Actual | $ 1,306,716 | $ 1,241,303
Minimum Capital Requirement | 405,736 | 377,096
Minimum To Be Well Capitalized | $ 586,063 | $ 544,695
Common Equity Tier 1 Capital to Risk Weighted Assets, Ratio |  |
Actual | 14.49% | 14.81%
Minimum Capital Requirement | 4.50% | 4.50%
Minimum To Be Well Capitalized | 6.50% | 6.50%
Tier 1 Capital to Risk Weighted Assets, Amount |  |
Actual | $ 1,306,716 | $ 1,241,303
Minimum Capital Requirement | 540,981 | 502,795
Minimum To Be Well Capitalized | $ 721,308 | $ 670,394
Tier 1 Capital to Risk Weighted Assets, Ratio |  |
Actual | 14.49% | 14.81%
Minimum Capital Requirement | 6.00% | 6.00%
Minimum To Be Well Capitalized | 8.00% | 8.00%
Total Capital to Risk Weighted Assets, Amount |  |
Actual | $ 1,384,024 | $ 1,306,616
Minimum Capital Requirement | 721,308 | 670,394
Minimum To Be Well Capitalized | $ 901,635 | $ 837,992
Total Capital to Risk Weighted Assets, Ratio |  |
Actual | 15.35% | 15.59%
Minimum Capital Requirement | 8.00% | 8.00%
Minimum To Be Well Capitalized | 10.00% | 10.00%
Leverage Ratio of Tier 1 Capital to Average Assets, Amount |  |
Actual | $ 1,306,716 | $ 1,241,303
Minimum Capital Requirement | 487,541 | 501,104
Minimum To Be Well Capitalized | $ 609,426 | $ 626,379
Leverage Ratio of Tier 1 Capital to Average Assets, Ratio |  |
Actual | 10.72% | 9.91%
Minimum Capital Requirement | 4.00% | 4.00%
Minimum To Be Well Capitalized | 5.00% | 5.00%

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