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Note 6 - Fair Value Measurements and Fair Value of Financial Instruments - Carrying Value and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Securities available-for-sale | $ 623,629 | $ 534,507
Reported Value Measurement [Member] |  |
Cash and due from banks | 333,844 | 265,536
Securities available-for-sale | 623,629 | 534,507
Restricted investments in bank stocks | 45,324 | 27,826
Equity securities | 15,563 | 13,794
Net loans | 7,808,733 | 6,749,849
Derivatives | 54,041 | 3,347
Accrued interest receivable | 38,940 | 34,152
Noninterest-bearing deposits | 1,665,658 | 1,617,049
Interest-bearing deposits | 5,644,852 | 4,715,904
Borrowings | 829,953 | 468,193
Subordinated debentures | 153,179 | 152,951
Accrued interest payable | 5,733 | 2,716
Estimate of Fair Value Measurement [Member] |  |
Cash and due from banks | 333,844 | 265,536
Securities available-for-sale | 623,629 | 534,507
Equity securities | 15,563 | 13,794
Net loans | 7,524,799 | 6,800,287
Derivatives | 54,041 | 3,347
Accrued interest receivable | 38,940 | 34,152
Noninterest-bearing deposits | 1,665,658 | 1,617,049
Interest-bearing deposits | 5,599,170 | 4,716,358
Borrowings | 826,280 | 469,671
Subordinated debentures | 153,170 | 163,995
Accrued interest payable | 5,733 | 2,716
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and due from banks | 333,844 | 265,536
Securities available-for-sale | 134 | 195
Equity securities | 9,701 | 11,081
Net loans | 0 | 0
Derivatives | 0 | 0
Accrued interest receivable | 0 | 0
Noninterest-bearing deposits | 1,665,658 | 1,617,049
Interest-bearing deposits | 3,723,617 | 3,565,795
Borrowings | 0 | 0
Subordinated debentures | 0 | 0
Accrued interest payable | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and due from banks | 0 | 0
Securities available-for-sale | 616,118 | 525,747
Equity securities | 5,862 | 2,713
Net loans | 0 | 0
Derivatives | 54,041 | 3,347
Accrued interest receivable | 3,219 | 1,554
Noninterest-bearing deposits | 0 | 0
Interest-bearing deposits | 1,875,553 | 1,150,563
Borrowings | 826,280 | 469,671
Subordinated debentures | 153,170 | 163,995
Accrued interest payable | 5,733 | 2,716
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and due from banks | 0 | 0
Securities available-for-sale | 7,377 | 8,565
Equity securities | 0 | 0
Net loans | 7,524,799 | 6,800,287
Derivatives | 0 | 0
Accrued interest receivable | 35,721 | 32,598
Noninterest-bearing deposits | 0 | 0
Interest-bearing deposits | 0 | 0
Borrowings | 0 | 0
Subordinated debentures | 0 | 0
Accrued interest payable | $ 0 | $ 0

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- Definition Fair value portion of accrued expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI https://asc.fasb.org/subtopic&trid=2196772 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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