Retirement Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Compensation And Retirement Disclosure [Abstract]
Provision for defined contribution plans	$ 1,725	$ 1,698	$ 1,168
Accrued pension liability	1,232	1,138
Net periodic pension costs, principally of interest cost and service cost	73	51	54
Actuarial present value of benefit obligations, assumed weighted average discount rate	3.40%	4.10%	5.30%
Actuarial present value of benefit obligations, assumed compensation increase rate	1.70%	1.50%	1.30%
Liability under the deferred compensation plans, total	3,410	3,437
Liability under the deferred compensation plans, long-term	2,654	2,494
Liability under the deferred compensation plans, current	756	943
Deferred compensation plan assets	$ 2,880	$ 3,086