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Regulatory Matters (Tables) | 9 Months Ended
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Sep. 30, 2025
Banking Regulation, Global Systemically Important Bank (GSIB) Surcharge [Abstract] |
Actual and Required Capital Ratios of Bank |
| Actual |  | Required for Capital Adequacy Purposes |  | Required to be Considered Well Capitalized
As of September 30, 2025: | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
| (dollars in thousands)
Total Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,240,959 |  |  | 15.11 | % |  | $ | 862,402 |  |  | 10.50 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,233,469 |  |  | 15.02 | % |  | $ | 862,260 |  |  | 10.50 | % |  | $ | 821,200 |  |  | 10.00 | %
Tier 1 Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,137,918 |  |  | 13.85 | % |  | $ | 698,135 |  |  | 8.50 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,130,460 |  |  | 13.77 | % |  | $ | 698,020 |  |  | 8.50 | % |  | $ | 656,960 |  |  | 8.00 | %
Common equity Tier 1 Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,097,918 |  |  | 13.37 | % |  | $ | 574,935 |  |  | 7.00 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,130,460 |  |  | 13.77 | % |  | $ | 574,840 |  |  | 7.00 | % |  | $ | 533,780 |  |  | 6.50 | %
Tier 1 Capital (to Average Assets): |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,137,918 |  |  | 11.71 | % |  | $ | 388,850 |  |  | 4.00 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,130,460 |  |  | 11.63 | % |  | $ | 388,755 |  |  | 4.00 | % |  | $ | 485,943 |  |  | 5.00 | %
| Actual |  |  |  | Required for Capital Adequacy Purposes |  | Required to be Considered Well Capitalized
As of December 31, 2024: | Amount |  | Ratio |  |  |  |  |  | Amount |  | Ratio |  | Amount |  | Ratio
| (dollars in thousands)
Total Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,258,218 |  |  | 15.71 | % |  |  |  |  |  | $ | 840,943 |  |  | 10.50 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,248,802 |  |  | 15.60 | % |  |  |  |  |  | $ | 840,740 |  |  | 10.50 | % |  | $ | 800,704 |  |  | 10.00 | %
Tier 1 Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,118,292 |  |  | 13.96 | % |  |  |  |  |  | $ | 680,763 |  |  | 8.50 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,148,328 |  |  | 14.34 | % |  |  |  |  |  | $ | 680,599 |  |  | 8.50 | % |  | $ | 640,563 |  |  | 8.00 | %
Common equity Tier 1 Capital (to Risk Weighted Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,060,690 |  |  | 13.24 | % |  |  |  |  |  | $ | 560,628 |  |  | 7.00 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,148,328 |  |  | 14.34 | % |  |  |  |  |  | $ | 560,493 |  |  | 7.00 | % |  | $ | 520,458 |  |  | 6.50 | %
Tier 1 Capital (to Average Assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated | $ | 1,118,292 |  |  | 11.70 | % |  |  |  |  |  | $ | 382,214 |  |  | 4.00 | % |  | N/A |  | N/A
Tri Counties Bank | $ | 1,148,328 |  |  | 12.02 | % |  |  |  |  |  | $ | 382,096 |  |  | 4.00 | % |  | $ | 477,620 |  |  | 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/1943274/2147477270/942-505-50-1 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/1943274/2147477270/942-505-50-1B + Details
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