Note 14 - Stock-Based Compensation (Detail) - Summary of Outstanding Stock Options (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Number of Shares	1,134,602	1,482,077	472,327	385,305
Weighted Average Exercise Price (in Dollars per share)	$ 46.75	$ 46.92	$ 43.07	$ 44.78
Aggregate Intrinsic Value (in Dollars)	$ 711,000
Options exercisable	197,602
Options exercisable (in Dollars per share)	$ 47.03
Options exercisable (in Dollars)	$ 402,000
Number of Shares	63,516	1,264,719	180,485
Weighted Average Exercise Price (in Dollars per share)	$ 44.28	$ 46.58	$ 35.55
Number of Shares	(295,371)	(224,969)	(72,149)
Weighted Average Exercise Price (in Dollars per share)	$ 45.41	$ 37.30	$ 36.69
Number of Shares	(115,620)	(30,000)	(21,314)
Weighted Average Exercise Price (in Dollars per share)	$ 50.99	$ 44.25	$ 32.01