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Note 15 - Accelerated Share Repurchases (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  |  |  |  |  | 8 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 17, 2020 | Jan. 17, 2020 | May 08, 2019 | May 07, 2019 | Jul. 19, 2018 | Jul. 19, 2018 | May 24, 2018 | Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 14, 2020 | May 02, 2019 | Jul. 16, 2018
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000 |
Payments for Repurchase of Common Stock |  |  |  |  |  |  |  |  | $ 30,000 | $ 30,000 |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares |  |  |  |  |  |  |  |  | 452 | 806 |  |  |  |
Accelerated Stock Repurchase [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  | $ 30,000 |  |  |  |  |  |  |  |  | 30,000 |
Payments for Repurchase of Common Stock |  |  |  | $ 30,000 |  |  |  |  |  |  |  |  |  |
Stock Repurchased During Period, Shares |  |  | 500 |  |  |  |  |  |  |  |  |  |  |
Share Price |  |  | $ 39.85 |  |  |  |  |  |  |  |  |  |  |
Share Repurchased, Pecentage |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |
Accelerated Stock Repurchase [Member] | Morgan Stanley & Co., LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments for Repurchase of Common Stock |  |  |  |  |  |  | $ 30,000 |  |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,000
Number of Additional Shares Deliver to Company if ASR Agreement Settled |  |  |  |  | 400 |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  |  | 800 | 400 |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share |  |  |  |  |  | $ 37.18 |  |  |  |  |  |  |  |
Accelerated Stock Repurchase [Member] | Morgan Stanley & Co., LLC [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  | $ 30,000 |  |  |  |  |  |  |
Accelerated Share Repurchases, Initial Price Paid Per Share |  |  |  |  |  |  | $ 41.41 |  |  |  |  |  |  |
Accelerated Stock Repurchase [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  |  |  |  |  |  |  |  |  | $ 12,000 |  |
Accelerated Stock Repurchase [Member] | Subsequent Event [Member] | Morgan Stanley & Co., LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Additional Shares Deliver to Company if ASR Agreement Settled |  | 100 |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares | 600 |  |  |  |  |  |  |  |  |  |  |  |  |
Accelerated Share Repurchases, Final Price Paid Per Share | $ 50.78 |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase from Open Market [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000 |
Treasury Stock, Shares, Acquired |  |  |  |  |  |  |  | 0 |  |  |  |  |  |

X
- Definition The number of additional shares would have been deliver to the company if the ASR Agreement had been settled as of June 30, 2019. + References No definition available. + Details
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- Definition The percentage of shares repurchased to estimated total number of shares expected to be repurchased under the agreement. + References No definition available. + Details
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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 The price paid per share to immediately purchase the targeted number of shares on the date of executing the accelerated share repurchase agreement. + 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 The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: 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 Reference 2: 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 3: 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 4: 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 + 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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