XML 69 R54.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Regulatory Capital Requirements (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Regulatory Capital Requirements [Abstract] |
Compliance with Regulatory Compliance Requirements Under Banking Regulations | The Company and NBT Bank’s actual capital amounts and ratios are presented as follows:
|  | Actual |  |  | Regulatory Ratio Requirements |
(Dollars in thousands) |  | Amount |  |  | Ratio |  |  | Minimum Capital Adequacy |  |  | Minimum plus Buffer |  |  | For Classification as Well- Capitalized |
As of December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tier 1 Capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,385,269 |  |  |  | 10.24 | % |  |  | 4.00 | % |  |  |  |  |  | 5.00 | %
NBT Bank |  |  | 1,263,661 |  |  |  | 9.39 | % |  |  | 4.00 | % |  |  |  |  |  | 5.00 | %
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 1,288,269 |  |  |  | 11.93 | % |  |  | 4.50 | % |  |  | 7.00 | % |  |  | 6.50 | %
NBT Bank |  |  | 1,263,661 |  |  |  | 11.79 | % |  |  | 4.50 | % |  |  | 7.00 | % |  |  | 6.50 | %
Tier 1 Capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 1,385,269 |  |  |  | 12.83 | % |  |  | 6.00 | % |  |  | 8.50 | % |  |  | 8.00 | %
NBT Bank |  |  | 1,263,661 |  |  |  | 11.79 | % |  |  | 6.00 | % |  |  | 8.50 | % |  |  | 8.00 | %
Total Capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 1,622,476 |  |  |  | 15.03 | % |  |  | 8.00 | % |  |  | 10.50 | % |  |  | 10.00 | %
NBT Bank |  |  | 1,377,868 |  |  |  | 12.86 | % |  |  | 8.00 | % |  |  | 10.50 | % |  |  | 10.00 | %
As of December 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tier 1 Capital (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 1,301,560 |  |  |  | 9.71 | % |  |  | 4.00 | % |  |  |  |  |  |  | 5.00 | %
NBT Bank |  |  | 1,223,551 |  |  |  | 9.16 | % |  |  | 4.00 | % |  |  |  |  |  |  | 5.00 | %
Common Equity Tier 1 Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 1,204,560 |  |  |  | 11.57 | % |  |  | 4.50 | % |  |  | 7.00 | % |  |  | 6.50 | %
NBT Bank |  |  | 1,223,551 |  |  |  | 11.84 | % |  |  | 4.50 | % |  |  | 7.00 | % |  |  | 6.50 | %
Tier 1 Capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 1,301,560 |  |  |  | 12.50 | % |  |  | 6.00 | % |  |  | 8.50 | % |  |  | 8.00 | %
NBT Bank |  |  | 1,223,551 |  |  |  | 11.84 | % |  |  | 6.00 | % |  |  | 8.50 | % |  |  | 8.00 | %
Total Capital (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 1,534,826 |  |  |  | 14.75 | % |  |  | 8.00 | % |  |  | 10.50 | % |  |  | 10.00 | %
NBT Bank |  |  | 1,333,817 |  |  |  | 12.91 | % |  |  | 8.00 | % |  |  | 10.50 | % |  |  | 10.00 | %

X
- References No definition available. + Details
Name: | srt_RegulatoryCapitalRequirementsAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration