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Note 15 - Share-Based and Other Compensation Programs Non-Qualified Stock Options (Details) - Non-Qualified Stock Options - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term |  | 4 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Outstanding, Beginning of Period, Number of Shares |  | 1,312,791 |  |
Outstanding, Beginning of Period, Weighted Average Exercise Price Per Share |  | $ 9.39 |  |
Exercised, Number of Shares |  | (329,900) |  |
Exercised, Weighted Average Exercise Price Per Share |  | $ 7.41 |  |
Forfeited, Number of Shares |  | (1,344) |  |
Forfeited, Weighted Average Exercise Price Per Share |  | $ 12.25 |  |
Expired, Number of Shares |  | 0 |  |
Expired, Weighted Average Exercise Price Per Share |  | $ 0 |  |
Outstanding, End of Period, Number of Shares |  | 981,547 | 1,312,791 |
Outstanding, End of Period, Weighted Average Exercise Price Per Share |  | $ 10.05 | $ 9.39 |
Options Outstanding, Weighted Average Remaining Contractual Life (Years) |  | 4 years |  |
Total intrinsic value of options outstanding | [1] | $ 14,833 |  |
Exercisable, Number of Shares |  | 853,041 |  |
Exercisable, Weighted Average Exercise Price Per Share |  | $ 9.73 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term |  | 3 years 8 months 12 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | [1] | $ 13,163 |  |
Available for grant |  | 6,266,017 |  |
Share Price |  | $ 25.16 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  | $ 4,984 | $ 6,274 | $ 14,389
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options |  | 1,047 | 1,318 | 5,036
Proceeds from Stock Options Exercised |  | 2,416 | 1,425 | 7,131
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value |  | $ 30 | $ 1,300 | $ 3,300
2019 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Granted, Number of Shares |  | 0 |  |
Granted, Weighted Average Exercise Price Per Share |  | $ 0 |  |
2018 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Granted, Number of Shares |  |  | 0 |
2017 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Granted, Number of Shares |  |  |  | 0
Share-based Compensation Award, Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  | 50.00% |  |
Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  | 50.00% |  |
[1] | Based on the market price of $25.16 at December 31, 2019.

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + 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)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + 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)(iv)(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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