Note 21 - Incentive Plans (Detail) - Stock Options - Significant Fair Value Assumptions (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted average fair value of options granted (in Dollars per share)	$ 4.52	$ 4.39	$ 3.82
Weighted average risk-free interest rates	1.04%	2.02%	2.40%
Weighted average expected option lives (in years)	6 years 3 months	6 years 3 months	6 years 3 months
Weighted average expected volatility	37.53%	36.82%	37.98%
Weighted average expected dividend yield	3.94%	3.98%	4.21%