Note 17 - Share-based Compensation (Details) - Inputs Used for Valuation of Option Grants Under Stock Option Plans	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Minimum [Member]
Note 17 - Share-based Compensation (Details) - Inputs Used for Valuation of Option Grants Under Stock Option Plans [Line Items]
Expected volatility	46.90%	48.10%	46.90%	48.10%
Weighted-average volatility	47.10%	48.30%	47.10%	48.30%
Expected dividends	2.79%	2.28%	2.79%	2.28%
Risk-free rate	0.80%	0.90%	0.80%	0.90%
Average risk-free rate	1.10%	1.20%	1.10%	1.20%
Expected term (in years)	5 years 292 days	5 years 255 days	5 years 292 days	5 years 255 days
Pre-vesting departure rate	0.40%	0.40%	0.40%	0.40%
Maximum [Member]
Note 17 - Share-based Compensation (Details) - Inputs Used for Valuation of Option Grants Under Stock Option Plans [Line Items]
Expected volatility	47.10%	48.30%	47.40%	48.90%
Weighted-average volatility	47.10%	48.30%	47.30%	48.50%
Expected dividends	2.79%	2.28%	3.02%	2.33%
Risk-free rate	1.10%	1.20%	1.50%	1.30%
Average risk-free rate	1.10%	1.20%	1.40%	1.30%
Expected term (in years)	7 years 73 days	7 years 36 days	7 years 73 days	7 years 36 days
Pre-vesting departure rate	4.10%	4.20%	4.10%	4.20%