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REGULATORY CAPITAL (Tables) | 12 Months Ended
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Dec. 31, 2023
Banking and Thrift, Other Disclosure [Abstract] |
Schedule of applicable holding company and bank regulatory capital requirements | The following tables summarize regulatory capital requirements applicable to Busey and its subsidiary bank (dollars in thousands):
| As of December 31, 2023
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well Capitalized
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Common equity Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,155,973 |  |  | 13.09 | % |  | $ | 397,331 |  |  | 4.50 | % |  | $ | 573,923 |  |  | 6.50 | %
Busey Bank | $ | 1,362,962 |  |  | 15.48 | % |  | $ | 396,128 |  |  | 4.50 | % |  | $ | 572,185 |  |  | 6.50 | %
Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,229,973 |  |  | 13.93 | % |  | $ | 529,775 |  |  | 6.00 | % |  | $ | 706,367 |  |  | 8.00 | %
Busey Bank | $ | 1,362,962 |  |  | 15.48 | % |  | $ | 528,171 |  |  | 6.00 | % |  | $ | 704,228 |  |  | 8.00 | %
Total capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,540,318 |  |  | 17.44 | % |  | $ | 706,367 |  |  | 8.00 | % |  | $ | 882,958 |  |  | 10.00 | %
Busey Bank | $ | 1,448,307 |  |  | 16.45 | % |  | $ | 704,228 |  |  | 8.00 | % |  | $ | 880,285 |  |  | 10.00 | %
Leverage ratio of Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,229,973 |  |  | 10.08 | % |  | $ | 488,315 |  |  | 4.00 | % |  | N/A |  | N/A
Busey Bank | $ | 1,362,962 |  |  | 11.19 | % |  | $ | 487,103 |  |  | 4.00 | % |  | $ | 608,879 |  |  | 5.00 | %
| As of December 31, 2022
| Actual |  | Minimum Capital Requirement |  | Minimum To Be Well Capitalized
| Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
Common equity Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,081,686 |  |  | 11.96 | % |  | $ | 406,980 |  |  | 4.50 | % |  | $ | 587,861 |  |  | 6.50 | %
Busey Bank | $ | 1,306,716 |  |  | 14.49 | % |  | $ | 405,736 |  |  | 4.50 | % |  | $ | 586,063 |  |  | 6.50 | %
Tier 1 capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,155,686 |  |  | 12.78 | % |  | $ | 542,640 |  |  | 6.00 | % |  | $ | 723,521 |  |  | 8.00 | %
Busey Bank | $ | 1,306,716 |  |  | 14.49 | % |  | $ | 540,981 |  |  | 6.00 | % |  | $ | 721,308 |  |  | 8.00 | %
Total capital to risk weighted assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,457,994 |  |  | 16.12 | % |  | $ | 723,521 |  |  | 8.00 | % |  | $ | 904,401 |  |  | 10.00 | %
Busey Bank | $ | 1,384,024 |  |  | 15.35 | % |  | $ | 721,308 |  |  | 8.00 | % |  | $ | 901,635 |  |  | 10.00 | %
Leverage ratio of Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
First Busey | $ | 1,155,686 |  |  | 9.45 | % |  | $ | 489,124 |  |  | 4.00 | % |  | N/A |  | N/A
Busey Bank | $ | 1,306,716 |  |  | 10.72 | % |  | $ | 487,541 |  |  | 4.00 | % |  | $ | 609,426 |  |  | 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/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
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