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Note 14 - Capital Stock Share Repurchase Programs (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 $ / shares shares | Jun. 30, 2017 $ / shares shares | Jun. 30, 2018 $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Feb. 25, 2020 USD ($) | Feb. 13, 2020 USD ($) | Aug. 14, 2019 USD ($) | Mar. 20, 2019 USD ($) | Aug. 16, 2018 USD ($) | Aug. 09, 2017 USD ($) | Jun. 29, 2016 USD ($)
3Q18 Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  | $ 100.0 |  |
1Q19 Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  | $ 150.0 |  |  |
Total of 3Q18 and 1Q19 Repurchase Programs |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  | $ 250.0 |  |  |
Stock Repurchased During Period, Shares | shares |  |  |  | 11,258,574 |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share | $ / shares |  |  |  | $ 22.22 |  |  |  |  |  |  |
Percent of Reduction in Shares Outstanding |  |  |  | 0.053 |  |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  | $ 0.0 |  |  |  |  |  |  |
3Q19 Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  | $ 200.0 |  |  |  |
Stock Repurchased During Period, Shares | shares |  |  |  | 2,195,661 |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share | $ / shares |  |  |  | $ 22.79 |  |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  | $ 150.0 |  |  |  |  |  |  |
3Q17 Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  | $ 50.0 |
Stock Repurchased During Period, Shares | shares |  |  | 3,022,856 |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share | $ / shares |  |  | $ 16.56 |  |  |  |  |  |  |  |
2Q16 Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  | $ 125.0
Stock Repurchased During Period, Shares | shares |  | 380 |  |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share | $ / shares |  | $ 15.59 |  |  |  |  |  |  |  |  |
Subsequent Event | 1Q20 Repurchase Program |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 275.0 |  |  |  |  |
Subsequent Event | Total of 3Q19 and 1Q20 Repurchase Programs |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  | $ 475.0 |  |  |  |  |
Stock Repurchased During Period, Shares | shares | 2,738,462 |  |  |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share | $ / shares | $ 24.03 |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  |  | $ 359.2 |  |  |  |  |  |

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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