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Note 15 - Share-Based and Other Compensation Programs RSUs (Details) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) anniversary $ / shares shares | Dec. 31, 2018 USD ($) anniversary $ / shares shares | Dec. 31, 2017 USD ($) $ / shares shares
Performance-based RSUs (Equity settled) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Unvested, Beginning of Period, Number of Shares | [1] | 2,692,949 |  |
Unvested, Beginning of Period, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [1] | $ 14.32 |  |
Granted, Number of Shares | [2] | 656,854 |  |
Granted, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [2] | $ 21.45 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares | [3] | 400,757 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares, Weighted Average Grant Date Fair Value | $ / shares | [3] | $ 0 |  |
Vested, Number of Shares | [4] | (1,246,824) |  |
Vested, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [4] | $ 8.43 |  |
Forfeited, Number of Shares |  | (55,389) |  |
Forfeited, Weighted Average Grant-Date Fair Value Per Share | $ / shares |  | $ 17.81 |  |
Unvested, End of Period, Number of Shares | [1] | 2,448,347 | 2,692,949 |
Unvested, End of Period, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [1] | $ 17.03 | $ 14.32 |
Grants by Compensation Committee | [2] | 656,854 |  |
Performance-based RSUs (Equity settled) | 2019 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  | 3 years |  |
Share Based Compensation, Maximum Multiplier for Target Payout |  | 6 |  |
Performance-based RSUs (Equity settled) | 2019 Award Year | Share-based Compensation Award, Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  | 3 years |  |
Performance-based RSUs (Equity settled) | 2019 Award Year | Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  | 3 years |  |
Performance-based RSUs (Equity settled) | 2018 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  |  | 3 years |
Maximum Payout Percentage of Target Award |  |  | 200.00% |
Share Based Compensation, Maximum Multiplier for Target Payout |  |  | 6 |
Performance-based RSUs (Equity settled) | 2018 Award Year | Share-based Compensation Award, Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  | 3 years | 3 years |
Performance-based RSUs (Equity settled) | 2018 Award Year | Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  |  | 3 years |
Performance-based RSUs (Equity settled) | 2017 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  |  |  | 3 years
Maximum Payout Percentage of Target Award |  |  |  | 200.00%
Share Based Compensation, Maximum Multiplier for Target Payout |  |  |  | 6
Performance-based RSUs (Equity settled) | 2017 Award Year | Share-based Compensation Award, Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  |  |  | 3 years
Performance-based RSUs (Equity settled) | 2017 Award Year | Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Award Requisite Service Period |  |  |  | 3 years
Performance-based RSUs (Equity settled) | Executive Officer | 2017 Award Year | Share-based Compensation Award, Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  | 50.00% |  |
Performance-based RSUs (Equity settled) | Certain Executives and Non-Executive Officers | 2019 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Granted, Number of Shares |  | 486,540 |  |
Grants by Compensation Committee |  | 486,540 |  |
Performance-based RSUs (Equity settled) | Certain Executives and Non-Executive Officers | 2018 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Granted, Number of Shares |  |  | 595,320 |
Grants by Compensation Committee |  |  | 595,320 |
Performance-based RSUs (Equity settled) | Certain Executives and Non-Executive Officers | 2017 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Granted, Number of Shares |  |  |  | 456,510
Grants by Compensation Committee |  |  |  | 456,510
Timed-vested RSUs (Equity settled) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Unvested, Beginning of Period, Number of Shares | [1] | 704,062 |  |
Unvested, Beginning of Period, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [1] | $ 16.51 |  |
Granted, Number of Shares | [2] | 380,568 |  |
Granted, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [2] | $ 22.76 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares | [3] | 0 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares, Weighted Average Grant Date Fair Value | $ / shares | [3] | $ 0 |  |
Vested, Number of Shares | [4] | (368,325) |  |
Vested, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [4] | $ 16.81 |  |
Forfeited, Number of Shares |  | (18,729) |  |
Forfeited, Weighted Average Grant-Date Fair Value Per Share | $ / shares |  | $ 18.31 |  |
Unvested, End of Period, Number of Shares | [1] | 697,576 | 704,062 |
Unvested, End of Period, Weighted Average Grant-Date Fair Value Per Share | $ / shares | [1] | $ 19.72 | $ 16.51 |
Grants by Compensation Committee | [2] | 380,568 |  |
Number of Anniversaries of the Grant Date | anniversary |  | 3 | 3 |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 3 years | 3 years | 3 years
RSUs (Equity settled) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Granted, Weighted Average Grant-Date Fair Value Per Share | $ / shares |  |  | $ 15.43 | $ 16.60
Fair Value of RSUs Vested | $ |  | $ 36.2 | $ 3.3 | $ 1.4
Minimum | Performance-based RSUs (Equity settled) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Post-Vesting Holding Period |  | 1 year |  |
Minimum | Performance-based RSUs (Equity settled) | 2019 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Maximum Payout Percentage of Target Award |  | 0.00% |  |
Minimum | Timed-vested RSUs (Equity settled) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  | 1 year |  |
Maximum | Performance-based RSUs (Equity settled) | 2019 Award Year |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Maximum Payout Percentage of Target Award |  | 200.00% |  |
[1] | The final amount of RSUs distributed depends on the level of performance achieved along with each employee’s continued service through the vest date, which could result in changes in vested RSUs.
[2] | For performance-based RSUs, amount represents the probable outcome at grant date.
[3] | Represents an adjustment to the number of unvested performance-based RSUs due to changes during the period in our estimated payouts, which can range from 0 to 200% of target depending on results over the applicable performance periods.
[4] | Represents amounts vested during the year, which can include both original shares granted and the impact of performance adjustments.

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- Definition The number of anniversaries of the grant date upon which RSUs will vest in pro rata installments. + References No definition available. + Details
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- Definition The maximum multiplier that can be used against a grantee's total award to calculate the target value of a share-based compensation award. This calculated value (the multiplier times the grantee's total award value on the grant date) represents the maximum payout in dollars allowed under the plan. + References No definition available. + Details
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares, Weighted Average Grant Date Fair Value + References No definition available. + Details
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- Definition The holding period after the vesting of performance RSUs that were granted to executive officers after which the vested awards will be convertible into shares. + References No definition available. + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Percentage of vesting of award under share-based payment arrangement. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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