Employee Benefits - Components of Net Pension Expense for All Plans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 68	$ 73
Weighted-average assumptions:
Discount rate	4.50%	6.50%	6.50%
Expected return on plan assets	4.00%	4.00%	4.00%
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	68	74	73
Expected return on assets	(40)	(41)	(43)
Amortization of prior service cost	108	55	53
Settlement cost	118	0	0
Net pension expense	$ 254	$ 88	$ 83