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Note 15 - Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of matching contributions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (dollars in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Matching contribution | ​ | $ | 2,520 | ​ | $ | 2,443 | ​ | $ | 2,000
Schedule of Change in compensation agreements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (dollars in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, beginning | ​ | $ | 19,474 | ​ | $ | 15,029 | ​ | $ | 12,347
Employee deferrals | ​ |  | 3,959 | ​ |  | 2,474 | ​ |  | 1,407
Company match and interest | ​ |  | 2,628 | ​ |  | 2,072 | ​ |  | 1,367
Cash payments made | ​ |  | (1,348) | ​ |  | (101) | ​ |  | (92)
Balance, ending | ​ | $ | 24,713 | ​ | $ | 19,474 | ​ | $ | 15,029
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Supplemental Executive Retirement Plans [Member] |
Notes Tables |
Schedule of Change in compensation agreements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (dollars in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, beginning | ​ | $ | 5,160 | ​ | $ | 4,623 | ​ | $ | 4,330
Expense accrued | ​ |  | 1,193 | ​ |  | 701 | ​ |  | 457
Cash payments made | ​ |  | (164) | ​ |  | (164) | ​ |  | (164)
Balance, ending | ​ | $ | 6,189 | ​ | $ | 5,160 | ​ | $ | 4,623

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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