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Note 13 - Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Net Funded Status [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
(Amounts in thousands) |  |  |  |  |  |  |  |
Beginning balance |  | $ | 9,265 |  |  | $ | 9,635 |
Plan change |  |  | 262 |  |  |  | - |
Service cost |  |  | 320 |  |  |  | 245 |
Interest cost |  |  | 404 |  |  |  | 358 |
Actuarial loss (gain) |  |  | 1,570 |  |  |  | (565 | )
Benefits paid |  |  | (509 | ) |  |  | (408 | )
Ending balance |  | $ | 11,312 |  |  | $ | 9,265 |
Schedule of Net Benefit Costs [Table Text Block] |
|  | Year Ended December 31, |  |
|  | 2019 |  |  | 2018 |  |  | 2017 |  | Income Statement Location
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | 320 |  |  | $ | 245 |  |  | $ | 231 |  | Salaries and employee benefits
Interest cost |  |  | 404 |  |  |  | 358 |  |  |  | 372 |  | Other expense
Amortization of prior service cost |  |  | 257 |  |  |  | 228 |  |  |  | 228 |  | Other expense
Amortization of losses |  |  | 20 |  |  |  | 57 |  |  |  | 31 |  | Other expense
Net periodic cost |  | $ | 1,001 |  |  | $ | 888 |  |  | $ | 862 |  |
Assumed discount rate |  |  | 3.10 | % |  |  | 4.28 | % |  |  | 3.85 | % |
Schedule of Expected Benefit Payments [Table Text Block] |
(Amounts in thousands) |  |  |  |
2020 |  | $ | 590 |
2021 |  |  | 648 |
2022 |  |  | 652 |
2023 |  |  | 651 |
2024 |  |  | 679 |
2025 through 2029 |  |  | 3,520 |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] |
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax compensation expense |  | $ | 1,481 |  |  | $ | 1,158 |  |  | $ | 790 |
Excess tax benefit |  |  | - |  |  |  | 95 |  |  |  | 17 |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Option |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual |  |  | Aggregate Intrinsic |
(Amounts in thousands, except share and per share data) |  | Shares |  |  | Per Share |  |  | Term (Years) |  |  | Value |
Outstanding, January 1, 2019 |  |  | 156,255 |  |  | $ | 20.85 |  |  |  |  |  |  |  |  |
Granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Exercised |  |  | (8,459 | ) |  |  | 16.14 |  |  |  |  |  |  |  |  |
Canceled |  |  | (596 | ) |  |  | 24.72 |  |  |  |  |  |  |  |  |
Outstanding, December 31, 2019 |  |  | 147,200 |  |  | $ | 21.10 |  |  |  | 4.6 |  |  | $ | 1,460 |
Exercisable, December 31, 2019 |  |  | 126,699 |  |  | $ | 20.52 |  |  |  | 4.2 |  |  | $ | 1,331 |
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  |  |  |  |  | Weighted Average |
|  | Shares |  |  | Grant-Date Fair Value |
Nonvested, January 1, 2019 |  |  | 51,113 |  |  | $ | 27.37 |
Granted |  |  | 50,521 |  |  |  | 34.22 |
Vested |  |  | (43,784 | ) |  |  | 29.26 |
Canceled |  |  | (197 | ) |  |  | 32.76 |
Nonvested, December 31, 2019 |  |  | 57,653 |  |  | $ | 31.93 |

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- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + 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 (f) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 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 (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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