Remaining Annual Amounts of Principal Payments of Credit Facility (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Line Of Credit Facility [Line Items]
Year 1	$ 20,000
Year 2	20,000
Year 3	20,000
Year 4	113,500
Thereafter	2,457
Total debt	175,957	$ 241,960
Term Loan
Line Of Credit Facility [Line Items]
Year 1	20,000
Year 2	20,000
Year 3	20,000
Year 4	5,000
Total debt	65,000	85,000
Yen Line of Credit
Line Of Credit Facility [Line Items]
Thereafter	2,457
Total debt	2,457	2,960
U.S. Dollar Line of credit
Line Of Credit Facility [Line Items]
Year 4	108,500
Total debt	$ 108,500	$ 154,000