Note 2 - Earnings Per Share (Detail) - Earnings Per Share Computation (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Net Income (in Dollars)	$ 5,937	$ 6,355	$ 21,329
Average common shares outstanding	16,516	17,215
Average potential dilutive common shares	4	8
Average diluted common shares	16,520	17,223
Basic earnings per share (in Dollars per share)	$ 0.36	$ 0.37
Diluted earnings per share (in Dollars per share)	$ 0.36	$ 0.37