Note 1 - Summary of Significant Interim Accounting Policies (Detail) - SARS Transactions (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Outstanding December 31, 2011	671,500
Outstanding December 31, 2011 (in Dollars per share)	$ 10.66
Granted	194,223
Granted (in Dollars per share)	$ 12.62
Exercised	(74,045)	(10,900)
Exercised (in Dollars per share)	$ 9.68
Outstanding September 30, 2012	681,924
Outstanding September 30, 2012 (in Dollars per share)	$ 11.02
Stock Appreciation Rights (SARs) [Member]
Outstanding December 31, 2011	257,424
Outstanding December 31, 2011 (in Dollars per share)	$ 11.32
Granted	65,752
Granted (in Dollars per share)	$ 13.15
Exercised	(115,004)
Exercised (in Dollars per share)	$ 12.10
Cancelled	(12,396)
Cancelled (in Dollars per share)	$ 13.15
Outstanding September 30, 2012	195,776
Outstanding September 30, 2012 (in Dollars per share)	$ 11.36