Stock Based Compensation Plans (Narrative) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended					1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended								1 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Maximum [Member]	Dec. 31, 2010 Restricted Stock [Member] Employees [Member]	Jun. 30, 2012 Restricted Stock [Member] Employees [Member]	Jun. 30, 2012 Restricted Stock [Member] Non Employee Directors [Member]	Dec. 31, 2010 Performance Shares [Member]	Jun. 30, 2012 Performance Shares [Member]	Jun. 30, 2012 Restricted Stock and Restricted Stock Units [Member]	Jun. 30, 2011 Restricted Stock and Restricted Stock Units [Member]	Jun. 30, 2010 Restricted Stock and Restricted Stock Units [Member]	Jun. 30, 2012 2010PlanMember	Feb. 12, 2010 2010PlanMember	Jun. 30, 2012 2007PlanMember	Dec. 06, 2007 2007PlanMember Categories	Sep. 30, 2002 2002PlanMember	Jun. 30, 2012 2002PlanMember	Jun. 30, 2012 1998PlanMember	Jun. 30, 2012 1980PlanMember
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock that may be issued															2,000,000		700,000	1,688,000
Number of types of awards																	5
Common stock granted, vesting period	3 years	3 years				3 years	3 years	1 year										3 years
Stock options granted to employees	217,000	240,000
Stock options granted to employees, term in years	10 years	10 years
Shares of common stock available for grant														674,000		39,000			28,000
Stock options, expiration date				Dec. 31, 2012	Dec. 31, 2021															Dec. 31, 2008	Sep. 30, 2005
Stock options exercised, total instrinsic value	$ 690	$ 178	$ 1,373
Restricted stock awarded and premium shares vested, common shares	8,000	11,000	10,000
Restricted stock awarded and premium shares vested, value	49	66	69
Non-cash restricted stock expense	11	33	54
Non-cash stock option plan expense	333	186	360
Stock-based compensation expense related to modification of certain stock options	11	54
Total unrecognized compensation cost related to option awards	589
Stock options granted during the period	217,000		0
Per-share weighted-average fair value of stock options granted during the period	$ 2.07	$ 2.88
Common stock granted, shares						62,000	103,000	38,000	62,000	49,000
Upper limit of target grant, shares									93,000	73,000
Performance-vested restricted stock units, vesting percentage									100.00%	100.00%
Non-cash stock-based compensation expense	1,168	854	1,043								824	635	629
Remaining stock-based compensation expense											$ 1,163
Remaining stock-based compensation expense, period for recognition											1 year 7 months 6 days