Condensed 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, beginning at Jun. 30, 2011	$ 199,671	$ 279	$ 113,686	$ 100,231	$ (15,961)	$ 1,436
Net income	10,540
Other comprehensive income (loss)	(721)					(721)
Exercise of stock options (21,600 and 15,400 shares for six month period ended December 31, 2012 and 2011, respectively)	80		40		40
Tax effect of exercised stock options and vesting of deferred shares	(150)		(150)
Issuance of deferred shares (350,048 and 161,222 shares for six month period ended December 31, 2012 and 2011, respectively))	0		(419)		419
Employee Stock Purchase Plan (2,055 and 2,636 shares for six month period ended December 31, 2012 and 2011, respectively)	27		21		6
Open market purchase of treasury shares (886,503 shares)	(8,126)				(8,126)
Other treasury share purchases (101,271 and 45,143 shares for six month period ended December 31, 2012 and 2011, respectively)	(439)				(439)
Stock-based compensation expense	1,735		1,735
Balances, ending at Dec. 31, 2011	202,617	279	114,913	110,771	(24,061)	715
Balances, beginning at Jun. 30, 2012	211,097	279	116,693	117,419	(24,065)	771
Net income	10,120
Other comprehensive income (loss)	315					315
Exercise of stock options (21,600 and 15,400 shares for six month period ended December 31, 2012 and 2011, respectively)	106		(89)		195
Tax effect of exercised stock options and vesting of deferred shares	(27)		(27)
Issuance of deferred shares (350,048 and 161,222 shares for six month period ended December 31, 2012 and 2011, respectively))	0		(1,347)		1,347
Employee Stock Purchase Plan (2,055 and 2,636 shares for six month period ended December 31, 2012 and 2011, respectively)	22		17		5
Other treasury share purchases (101,271 and 45,143 shares for six month period ended December 31, 2012 and 2011, respectively)	(1,065)				(1,065)
Stock-based compensation expense	1,812		1,812
Balances, ending at Dec. 31, 2012	$ 222,380	$ 279	$ 117,059	$ 127,539	$ (23,583)	$ 1,086