Remaining Annual Amounts of Principal Payments of Credit Facility (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Line Of Credit Facility [Line Items]
Year 1	$ 20,000
Year 2	20,000
Year 3	193,000
Year 5	2,917
Total debt	235,917	$ 175,957
Term Loans
Line Of Credit Facility [Line Items]
Year 1	20,000
Year 2	20,000
Year 3	5,000
Total debt	45,000	65,000
Yen Line of Credit
Line Of Credit Facility [Line Items]
Year 5	2,917
Total debt	2,917	2,457
U.S. Dollar Line of Credit
Line Of Credit Facility [Line Items]
Year 3	188,000
Total debt	$ 188,000	$ 108,500