Remaining Annual Amounts of Principal Payments of Credit Facility (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016
Line Of Credit Facility [Line Items]
Year 1	$ 20,000
Year 2	20,000
Year 3	20,000
Year 4	22,683
Year 5	197,000
Total debt	279,683	$ 235,917
Term Loans
Line Of Credit Facility [Line Items]
Year 1	20,000
Year 2	20,000
Year 3	20,000
Year 4	20,000
Year 5	10,000
Total debt	90,000	45,000
Yen Line of Credit
Line Of Credit Facility [Line Items]
Year 4	2,683
Total debt	2,683	2,917
U.S. Dollar Line of Credit
Line Of Credit Facility [Line Items]
Year 5	187,000
Total debt	$ 187,000	$ 188,000