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Note 6 - Earnings Per Share ("EPS") (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  |  |  |  |  | 2 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 19, 2018 | May 24, 2018 | Aug. 31, 2016 | Feb. 29, 2016 | Feb. 26, 2016 | Jul. 19, 2018 | Aug. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jul. 16, 2018 | Aug. 26, 2016
Payments for Repurchase of Common Stock |  |  |  |  |  |  |  | $ 30,000 |  | $ 25,000 |  |
Accelerated Stock Repurchase [Member] | Morgan Stanley & Co., LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Payments for Repurchase of Common Stock |  | $ 30,000 |  |  | $ 25,000 |  |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares | 400 | 400 | 100 |  | 400 | 800 | 500 |  |  |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  |  |  |  |  |  |  |  |  | $ 12,000 | $ 7,500
Accelerated Share Repurchases, Final Price Paid Per Share |  |  |  |  |  | $ 37.18 | $ 47.08 |  |  |  |  |
Accelerated Stock Repurchase [Member] | Morgan Stanley & Co., LLC [Member] | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  | $ 30,000 |  |  | $ 25,000 |  |  |  |  |  |  |
Accelerated Share Repurchases, Initial Price Paid Per Share |  | $ 41.41 |  | $ 46.40 |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  | 42 | 100 | 100 |  |
Employee Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  | 700 | 500 | 400 |  |

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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 Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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