Note 14 - Stock-Based Compensation (Detail) - Summary of Assumptions Used To Value Options Granted	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Risk-free interest rate	0.28%	2.02%	1.88%
Expected volatility	38.80%	23.70%	25.30%
Expected life, in years	2 years 36 days	4 years 292 days	4 years 6 months
Expected dividend yield	2.91%	3.62%	3.55%