Retirement Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Provision for defined contribution plans	$ 1,698	$ 1,168	$ 1,052
Accrued pension liability	1,138	982
Net periodic pension costs, principally of interest cost and service cost	51	54	56
Actuarial present value of benefit obligations, assumed weighted average discount rate	4.10%	5.30%	5.20%
Actuarial present value of benefit obligations, assumed compensation increase rate	1.50%	1.30%	0.80%
Liability under the deferred compensation plans, total	3,437	3,494
Liability under the deferred compensation plans, long-term	2,494	2,894
Liability under the deferred compensation plans, current	943	600
Deferred compensation plan assets	$ 3,086	$ 3,606