Condensed Consolidated Statements Of Changes In Stockholders' Equity And Comprehensive Income (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income(Loss) [Member]	Total
Balances at Jun. 30, 2010	$ 279	$ 111,637	$ 81,252	$ (16,078)	$ 495	$ 177,585
Net income			8,376			8,376
Other comprehensive income (loss)					756	756
Comprehensive income						9,132
Exercise of stock options		11	(3)	36		44
Tax effect of exercised stock options and the vesting of deferred shares		(112)				(112)
Issuance of deferred shares		(239)		239
Other treasury share purchases				(269)		(269)
Stock-based compensation expense		1,031				1,031
Balances at Dec. 31, 2010	279	112,328	89,625	(16,072)	1,251	187,411
Balances at Jun. 30, 2011	279	113,686	100,231	(15,961)	1,436	199,671
Net income			10,540			10,540
Other comprehensive income (loss)					(721)	(721)
Comprehensive income						9,819
Exercise of stock options		40		40		80
Tax effect of exercised stock options and the vesting of deferred shares		(150)				(150)
Issuance of deferred shares		(419)		419
Employee Stock Purchase Plan share purchase		21		6		27
Open market purchase of treasury shares				(8,126)		(8,126)
Other treasury share purchases				(439)		(439)
Stock-based compensation expense		1,735				1,735
Balances at Dec. 31, 2011	$ 279	$ 114,913	$ 110,771	$ (24,061)	$ 715	$ 202,617