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Note 16 - Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of matching contributions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
​ | ​ | (dollars in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Matching contribution | ​ | $ | 3,314 | ​ | $ | 3,071 | ​ | $ | 2,446
Schedule of Change in compensation agreements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
​ | ​ | (dollars in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, beginning | ​ | $ | 38,255 | ​ | $ | 32,353 | ​ | $ | 24,713
Employee deferrals | ​ |  | 4,306 | ​ | ​ | 3,615 | ​ |  | 4,900
Company match and interest | ​ |  | 4,788 | ​ | ​ | 2,776 | ​ |  | 3,048
Cash payments made | ​ |  | (549) | ​ |  | (489) | ​ |  | (308)
Balance, ending | ​ | $ | 46,800 | ​ | $ | 38,255 | ​ | $ | 32,353
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
Supplemental Executive Retirement Plans [Member] |
Notes Tables |
Schedule of Change in compensation agreements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
​ | ​ | (dollars in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, beginning | ​ | $ | 8,165 | ​ | $ | 7,273 | ​ | $ | 6,189
Expense accrued | ​ |  | 889 | ​ |  | 1,286 | ​ |  | 1,532
Cash payments made | ​ |  | (365) | ​ |  | (394) | ​ |  | (448)
Balance, ending | ​ | $ | 8,689 | ​ | $ | 8,165 | ​ | $ | 7,273
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of pension and other postretirement benefit arrangements with individual employees, which are generally based on employment contracts between the entity and one or more selected officers or key employees, and which contain a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period and the carrying amount as of the balance sheet date of the related liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 25 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483070/710-10-25-9 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483043/710-10-30-1 + Details
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- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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