XML 61 R47.htm IDEA: XBRL DOCUMENT
v3.20.4

Regulatory Matters (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Regulatory Matters [Abstract] |
Actual and Required Capital Ratios | The following table presents actual and required capital ratios as of December 31, 2020 and 2019 for the Company and the Bank under the Basel III Capital Rules. The minimum required capital amounts presented include the minimum required capital levels as of December 31, 2019 based on the phase-in provisions of the Basel III Capital Rules and the minimum required capital levels as of January 1, 2019 when the Basel III Capital Rules have been fully phased-in. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations, as amended to reflect the changes under the Basel III Capital Rules (in thousands):
|  | Actual |  |  | Minimum Capital Required – Basel III |  |  | Required to be Considered Well Capitalized |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tier 1 leverage: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 407,061 |  |  |  | 8.25 | % |  | $ | 197,344 |  |  |  | 4.00 | % |  | $ | 246,680 |  |  |  | 5.00 | %
Bank |  |  | 441,929 |  |  |  | 8.97 |  |  |  | 197,064 |  |  |  | 4.00 |  |  |  | 246,330 |  |  |  | 5.00 |
CET1 capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 389,733 |  |  |  | 10.18 |  |  |  | 268,010 |  |  |  | 7.00 |  |  |  | 248,866 |  |  |  | 6.50 |
Bank |  |  | 441,929 |  |  |  | 11.57 |  |  |  | 267,387 |  |  |  | 7.00 |  |  |  | 248,288 |  |  |  | 6.50 |
Tier 1 capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 407,061 |  |  |  | 10.63 |  |  |  | 325,441 |  |  |  | 8.50 |  |  |  | 306,297 |  |  |  | 8.00 |
Bank |  |  | 441,929 |  |  |  | 11.57 |  |  |  | 324,684 |  |  |  | 8.50 |  |  |  | 305,585 |  |  |  | 8.00 |
Total capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 521,193 |  |  |  | 13.61 |  |  |  | 402,015 |  |  |  | 10.50 |  |  |  | 382,871 |  |  |  | 10.00 |
Bank |  |  | 482,439 |  |  |  | 12.63 |  |  |  | 401,080 |  |  |  | 10.50 |  |  |  | 381,981 |  |  |  | 10.00 |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tier 1 leverage: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  | $ | 381,473 |  |  |  | 9.00 | % |  | $ | 169,504 |  |  |  | 4.00 | % |  | $ | 211,880 |  |  |  | 5.00 | %
Bank |  |  | 409,031 |  |  |  | 9.67 |  |  |  | 169,189 |  |  |  | 4.00 |  |  |  | 211,486 |  |  |  | 5.00 |
CET1 capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 364,145 |  |  |  | 10.31 |  |  |  | 247,330 |  |  |  | 7.00 |  |  |  | 229,663 |  |  |  | 6.50 |
Bank |  |  | 409,031 |  |  |  | 11.61 |  |  |  | 246,674 |  |  |  | 7.00 |  |  |  | 229,055 |  |  |  | 6.50 |
Tier 1 capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 381,473 |  |  |  | 10.80 |  |  |  | 300,329 |  |  |  | 8.50 |  |  |  | 282,663 |  |  |  | 8.00 |
Bank |  |  | 409,031 |  |  |  | 11.61 |  |  |  | 299,533 |  |  |  | 8.50 |  |  |  | 281,914 |  |  |  | 8.00 |
Total capital: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Company |  |  | 451,228 |  |  |  | 12.77 |  |  |  | 370,995 |  |  |  | 10.50 |  |  |  | 353,328 |  |  |  | 10.00 |
Bank |  |  | 439,514 |  |  |  | 12.47 |  |  |  | 370,011 |  |  |  | 10.50 |  |  |  | 352,392 |  |  |  | 10.00 |

X
- Definition Regulatory Matters [Abstract] + References No definition available. + Details
Name: | fisi_RegulatoryMattersAbstract
Namespace Prefix: | fisi_
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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958570-112826 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
Name: | us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration