Note 11 - Earnings Per Share - Earnings Per Share (Details) - USD ($) shares in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Net income (loss)	$ 107,735,000	$ 110,948,000	$ 112,561,000
Weighted average shares used in basic computation (in shares)	37,096	36,890	36,836
Dilutive stock options (in shares)	135	115	64
Weighted average shares used in diluted computation (in shares)	37,231	37,005	36,900
Basic EPS (in dollars per share)	$ 2.90	$ 3.01	$ 3.06
Diluted EPS (in dollars per share)	$ 2.89	$ 3	$ 3.05