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Note 29 - Revenue From Contracts With Customers - Revenue by Operating Segment (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Mortgage banking income | [1] | $ 3,705,000 |  | $ 3,210,000 | $ 4,724,000
Debt Securities, Available-for-Sale, Realized Gain (Loss) |  | (44,000) | [1] | 0 | 0
Bank owned life insurance | [1] | 2,253,000 |  | 1,597,000 | 914,000
Gain (loss) on sale of premises and equipment | [1] | (30,000) |  | 4,341,000 | (78,000)
Other | [2] | 4,992,000 |  | 5,328,000 | 3,904,000
Non-interest income |  | 92,220,000 |  | 89,149,000 | 65,850,000
Commercial Banking [Member] |  |  |  |  |
Mortgage banking income | [1] | 3,705,000 |  | 3,210,000 | 4,724,000
Debt Securities, Available-for-Sale, Realized Gain (Loss) | [1] | (44,000) |  |  |
Bank owned life insurance | [1] | 2,253,000 |  | 1,597,000 | 914,000
Gain (loss) on sale of premises and equipment | [1] | (30,000) |  | 4,369,000 | (78,000)
Other | [2] | 4,992,000 |  | 5,300,000 | 3,904,000
Non-interest income |  | 52,418,000 |  | 53,038,000 | 38,237,000
WM&T [Member] |  |  |  |  |
Mortgage banking income | [1] | 0 |  | 0 | 0
Debt Securities, Available-for-Sale, Realized Gain (Loss) | [1] | 0 |  |  |
Bank owned life insurance | [1] | 0 |  | 0 | 0
Gain (loss) on sale of premises and equipment | [1] | 0 |  | 0 | 0
Other | [2] | 0 |  | 0 | 0
Non-interest income |  | 39,802,000 |  | 36,111,000 | 27,613,000
Fiduciary and Trust [Member] |  |  |  |  |
Non-interest income |  | 39,802,000 |  | 36,111,000 | 27,613,000
Fiduciary and Trust [Member] | Commercial Banking [Member] |  |  |  |  |
Non-interest income |  | 0 |  | 0 | 0
Fiduciary and Trust [Member] | WM&T [Member] |  |  |  |  |
Non-interest income |  | 39,802,000 |  | 36,111,000 | 27,613,000
Deposit Account [Member] |  |  |  |  |
Non-interest income |  | 8,866,000 |  | 8,286,000 | 5,852,000
Deposit Account [Member] | Commercial Banking [Member] |  |  |  |  |
Non-interest income |  | 8,866,000 |  | 8,286,000 | 5,852,000
Deposit Account [Member] | WM&T [Member] |  |  |  |  |
Non-interest income |  | 0 |  | 0 | 0
Credit and Debit Card [Member] |  |  |  |  |
Non-interest income |  | 19,438,000 |  | 18,623,000 | 13,456,000
Credit and Debit Card [Member] | Commercial Banking [Member] |  |  |  |  |
Non-interest income |  | 19,438,000 |  | 18,623,000 | 13,456,000
Credit and Debit Card [Member] | WM&T [Member] |  |  |  |  |
Non-interest income |  | 0 |  | 0 | 0
Treasury Management [Member] |  |  |  |  |
Non-interest income |  | 10,033,000 |  | 8,590,000 | 6,912,000
Treasury Management [Member] | Commercial Banking [Member] |  |  |  |  |
Non-interest income |  | 10,033,000 |  | 8,590,000 | 6,912,000
Treasury Management [Member] | WM&T [Member] |  |  |  |  |
Non-interest income |  | 0 |  | 0 | 0
Product Sales Commissions and Fees [Member] |  |  |  |  |
Non-interest income |  | 3,205,000 |  | 3,063,000 | 2,553,000
Product Sales Commissions and Fees [Member] | Commercial Banking [Member] |  |  |  |  |
Non-interest income |  | 3,205,000 |  | 3,063,000 | 2,553,000
Product Sales Commissions and Fees [Member] | WM&T [Member] |  |  |  |  |
Non-interest income |  | $ 0 |  | $ 0 | $ 0
[1] | Outside of the scope of ASC 606.
[2] | Outside of the scope of ASC 606, with the exception of safe deposit fees which were nominal for all periods.

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- Definition Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Income from mortgage banking activities (fees and commissions) and servicing real estate mortgages, credit cards, and other financial assets held by others net of any related impairment of capitalized service costs. Also includes any premiums received in lieu of regular servicing fees on such loans only as earned over the life of the loans. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1402 -Subsection Instruction 3 -Publisher SEC + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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