Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income(Loss)
Balances at Jun. 30, 2009	$ 170,797	$ 279	$ 110,496	$ 76,387	$ (16,146)	$ (219)
Net income	4,876			4,876
Other comprehensive income (loss)	714					714
Exercise of stock options 31900, 32000 and 26500 shares at 2010, 2011 and 2012 respectively	115		38	(11)	88
Tax effect of exercised stock options and vesting of deferred shares	(496)		(496)
Issuance of deferred shares 165291,126428,and 184149 shares at 2010, 2011 and 2012 respectively			(453)		453
Other treasury share purchases 49138, 30154 and 52992 shares at 2010, 2011 and 2012 respectively	(473)				(473)
Stock-based compensation expense	2,052		2,052
Balances at Jun. 30, 2010	177,585	279	111,637	81,252	(16,078)	495
Net income	18,982			18,982
Other comprehensive income (loss)	941					941
Exercise of stock options 31900, 32000 and 26500 shares at 2010, 2011 and 2012 respectively	166		83	(3)	86
Tax effect of exercised stock options and vesting of deferred shares	(109)		(109)
Issuance of deferred shares 165291,126428,and 184149 shares at 2010, 2011 and 2012 respectively			(328)		328
Employee Stock Purchase Plan 699 and 4395 shares at 2011 and 2012 (Note 13)	10		8		2
Other treasury share purchases 49138, 30154 and 52992 shares at 2010, 2011 and 2012 respectively	(299)				(299)
Stock-based compensation expense	2,395		2,395
Balances at Jun. 30, 2011	199,671	279	113,686	100,231	(15,961)	1,436
Net income	17,188			17,188
Other comprehensive income (loss)	(665)					(665)
Exercise of stock options 31900, 32000 and 26500 shares at 2010, 2011 and 2012 respectively	167		98		69
Tax effect of exercised stock options and vesting of deferred shares	(152)		(152)
Issuance of deferred shares 165291,126428,and 184149 shares at 2010, 2011 and 2012 respectively			(479)		479
Employee Stock Purchase Plan 699 and 4395 shares at 2011 and 2012 (Note 13)	47		36		11
Open market purchase of treasury shares 886503 shares at 2012	(8,126)				(8,126)
Other treasury share purchases 49138, 30154 and 52992 shares at 2010, 2011 and 2012 respectively	(537)				(537)
Stock-based compensation expense	3,504		3,504
Balances at Jun. 30, 2012	$ 211,097	$ 279	$ 116,693	$ 117,419	$ (24,065)	$ 771