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Note 19 - Share-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
| Number of shares (in thousands) |  | Weighted- average exercise price |  | Weighted- average remaining contractual term in years |  | Aggregate intrinsic value (in thousands)
Options outstanding as of December 31, 2014 | 48,724 |  | $18.94 |  |  |  |
Granted | 1,578 |  | 21.48 |  |  |  |
Exercised | (6,340) |  | 16.13 |  |  |  |
Forfeited and expired | (1,224) |  | 20.78 |  |  |  |
Options outstanding as of December 31, 2015 | 42,738 |  | 19.40 |  | 3.93 |  | $83,023
Options expected to vest as of December 31, 2015 | 42,696 |  | 19.40 |  | 3.93 |  | 82,992
Options exercisable as of December 31, 2015 | 35,245 |  | 19.86 |  | 3.08 |  | 65,817
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
| 2015 |  | 2014 |  | 2013
Expected volatility | 43.6 | - | 44.9% |  | 45.4 | - | 46.2% |  | 46.5 | - | 47.4%
Weighted-average volatility | 43.6 | - | 44.9% |  | 45.4 | - | 46.2% |  | 46.6 | - | 47.3%
Expected dividends | 1.92 | - | 2.68% |  | 1.90 | - | 2.09% |  | 2.35 | - | 3.02%
Risk-free rate | 1.9 | - | 2.1% |  | 2.0 | - | 2.2% |  | 0.8 | - | 2.2%
Average risk-free rate | 1.9 | - | 2.1% |  | 2.0 | - | 2.2% |  | 1.1 | - | 2.2%
Expected term (in years) | 7.2 | - | 7.2 |  | 7.2 | - | 7.2 |  | 5.8 | - | 7.2
Pre-vesting departure rate | 0.6 | - | 0.6% |  | 0.5 | - | 0.5% |  | 0.4 | - | 4.1%
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
| Shares (000’s) |  | Weighted- average grant-date fair value
Non-vested shares and share units at December 31, 2014 | 5,737 |  | $15.43
Granted | 1,815 |  | 21.49
Vested | (2,238) |  | 14.35
Forfeited | (72) |  | 21.11
Non-vested shares and share units at December 31, 2015 | 5,242 |  | 17.91

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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