Retirement Plans (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Compensation And Retirement Disclosure [Abstract]
Provision for defined contribution plans	$ 1,849	$ 1,474	$ 1,725
Accrued pension liability	926	700
Net periodic pension costs, principally of interest cost and service cost	$ 53	$ 80	$ 73
Actuarial present value of benefit obligations, assumed weighted average discount rate	1.60%	3.00%	3.40%
Actuarial present value of benefit obligations, assumed compensation increase rate	0.00%	0.00%	1.70%
Liability under the deferred compensation plans, total	$ 2,974	$ 3,068
Liability under the deferred compensation plans, long-term	2,855	2,816
Liability under the deferred compensation plans, current	119	252
Deferred compensation plan assets	$ 2,550	$ 2,703