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Note 19 - Share-based Compensation (Details) - Valuation Inputs for Option Grants Under Stock Option Plans	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Minimum [Member]
Note 19 - Share-based Compensation (Details) - Valuation Inputs for Option Grants Under Stock Option Plans [Line Items]
Expected volatility	43.60%	45.40%	46.50%
Weighted-average volatility	43.60%	45.40%	46.60%
Expected dividends	1.92%	1.90%	2.35%
Risk-free rate	1.90%	2.00%	0.80%
Average risk-free rate	1.90%	2.00%	1.10%
Expected term (in years)	7 years 73 days	7 years 73 days	5 years 292 days
Pre-vesting departure rate	0.60%	0.50%	0.40%
Maximum [Member]
Note 19 - Share-based Compensation (Details) - Valuation Inputs for Option Grants Under Stock Option Plans [Line Items]
Expected volatility	44.90%	46.20%	47.40%
Weighted-average volatility	44.90%	46.20%	47.30%
Expected dividends	2.68%	2.09%	3.02%
Risk-free rate	2.10%	2.20%	2.20%
Average risk-free rate	2.10%	2.20%	2.20%
Expected term (in years)	7 years 73 days	7 years 73 days	7 years 73 days
Pre-vesting departure rate	0.60%	0.50%	4.10%

X

- References

No definition available.

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- Definition

The weighted average of risk free rates used in the period. Risk free rate is defined as the yield of a zero-coupon U.S. Treasury bond whose maturity period equals the option's expected term.

+ References

No definition available.

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- Definition

The pre-vesting departure rate used in the period for the valuation of option grants.

+ References

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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)(iii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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)(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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)(iv)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average expected volatility rate of share-based compensation awards.

+ 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)(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section D
-Subsection 2

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