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Note 18 - Employee Benefit Plans (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 6.00% |  |
Defined Benefit Plan, Employer Additional Contribution of Stock, Percent | 2.00% |  |
Defined Contribution Plan, Cost | $ 4,200,000 | $ 3,300,000 | $ 2,900,000
Defined Contribution Plan, Shares, Held in Employee Stock Ownership and Profit Sharing Plan (in shares) | 423,000 | 445,000 |
Deferred Compensation Arrangement with Individual, Contributions by Employer | $ 221,000 | $ 224,000 | $ 214,000
Deferred Compensation Arrangement with Individual, Recorded Liability | $ 11,200,000 | 10,800,000 |
Defined Benefit Plan, Number of Employees Covered | 2 |  |
Defined Benefit Plan, Number of Retired Employees Covered | 1 |  |
Defined Benefit Plan, Number of Present Employees Covered | 1 |  |
Deferred Compensation Arrangement with Individual, Requisite Service Period (Year) | 25 years |  |
Defined Benefit Plan, Accumulated Benefit Obligation | $ 2,300,000 | $ 2,100,000 |

X
- Definition Percentage of employees' gross pay for which the employer additionally contributes to a defined contribution plan. + References No definition available. + Details
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X
- Definition Number of employees eligible to participate in the defined benefit plan or plans described. + References No definition available. + Details
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X
- Definition Number of present employees eligible to participate in the defined benefit plan or plans described. + References No definition available. + Details
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X
- Definition Number of retired employees eligible to participate in the defined benefit plan or plans described. + References No definition available. + Details
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X
- Definition Represents the number of shares held by combined employee stock ownership and profit sharing plan as of the balance sheet date. + References No definition available. + Details
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X
- Definition Amount of contributions made by employer into fund established for purposes of making future disbursement to individual in accordance with deferred compensation arrangement. + References No definition available. + Details
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X
- Definition The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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X
- Definition Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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