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Note 15 - Stock-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2020 |  |  | 2019 |
Expected volatility |  |  | 28.5 | % |  |  | 35.0 | %
Expected term (in years) |  |  | 6.0 |  |  |  | 6.0 |
Expected dividends |  |  | 1.99 | % |  |  | 1.90 | %
Risk free rate |  |  | 1.31 | % |  |  | 2.66 | %
Grant date fair value |  | $ | 4.61 |  |  | $ | 6.32 |
Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted- |  |  |  |  |
|  |  |  |  |  | Weighted- |  |  | Average |  |  |  |  |
|  |  |  |  |  | Average |  |  | Remaining |  |  | Aggregate |
|  |  |  |  |  | Exercise |  |  | Contractual |  |  | Intrinsic |
(dollars in thousands, except for share amounts) |  | Shares |  |  | Price |  |  | Term (in years) |  |  | Value |
Outstanding at beginning of year |  |  | 1,090,968 |  |  | $ | 13.11 |  |  |  |  |  |  |  |  |
Granted |  |  | 51,000 |  |  |  | 20.10 |  |  |  |  |  |  |  |  |
Exercised |  |  | (56,498 | ) |  |  | 12.61 |  |  |  |  |  |  |  |  |
Forfeited/cancelled |  |  | (36,000 | ) |  |  | 18.32 |  |  |  |  |  |  |  |  |
Outstanding at end of year |  |  | 1,049,470 |  |  | $ | 13.30 |  |  |  | 3.52 years |  |  | $ | 189,917 |
Options exercisable |  |  | 958,470 |  |  | $ | 12.73 |  |  |  | 3.01 years |  |  | $ | 189,917 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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