Note 20 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly results of operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Quarterly results of operations [Abstract]
Net sales	$ 183,275		$ 165,970		$ 168,629		$ 183,386		$ 169,800		$ 150,666		$ 154,868		$ 159,306		$ 701,260	$ 634,640	$ 581,369
Gross profit	58,010		52,551		56,290		59,245		57,301		48,167		50,270		52,746		226,096	208,484	191,538
Net income (loss)	$ 12,496		$ 9,561		$ 10,961		$ 11,830		$ 13,943		$ 9,120		$ (4,116)		$ 11,958		$ 44,848	$ 30,905	$ 35,367
EARNINGS PER SHARE 1
Basic (in Dollars per share)	$ 0.99	[1]	$ 0.77	[1]	$ 0.88	[1]	$ 0.95	[1]	$ 1.10	[1]	$ 0.73	[1]	$ (0.33)	[1]	$ 0.96	[1]	$ 3.57	$ 2.47	$ 2.83
Diluted (in Dollars per share)	$ 0.98	[1]	$ 0.76	[1]	$ 0.86	[1]	$ 0.93	[1]	$ 1.08	[1]	$ 0.71	[1]	$ (0.32)	[1]	$ 0.94	[1]	$ 3.51	$ 2.42	$ 2.77

[1] Basic and diluted earnings per share are computed independently for each reporting period. Accordingly, the sum of the quarterly earnings per share amounts may not agree to the year-to-date amounts.